How to use

IDefinitions

in

appeng.api.definitions

@Override
public ItemStack getContainerItem( final ItemStack itemStack )
{
  return AEApi.instance()
      .definitions()
      .materials()
      .emptyStorageCell()
      .maybeStack( 1 )
      .orElseThrow( () -> new MissingDefinitionException( "Tried to use empty storage cells while basic storage cells are defined." ) );
}

public QnbFormedBakedModel( VertexFormat vertexFormat, IBakedModel baseModel, Function<ResourceLocation, TextureAtlasSprite> bakedTextureGetter )
{
  this.vertexFormat = vertexFormat;
  this.baseModel = baseModel;
  this.linkTexture = bakedTextureGetter.apply( TEXTURE_LINK );
  this.ringTexture = bakedTextureGetter.apply( TEXTURE_RING );
  this.glassCableTexture = bakedTextureGetter.apply( TEXTURE_CABLE_GLASS );
  this.coveredCableTexture = bakedTextureGetter.apply( TEXTURE_COVERED_CABLE );
  this.lightTexture = bakedTextureGetter.apply( TEXTURE_RING_LIGHT );
  this.lightCornerTexture = bakedTextureGetter.apply( TEXTURE_RING_LIGHT_CORNER );
  this.linkBlock = AEApi.instance().definitions().blocks().quantumLink().maybeBlock().orElse( null );
}

public DisassembleRecipe()
{
  final IDefinitions definitions = AEApi.instance().definitions();
  final IBlocks blocks = definitions.blocks();
  final IItems items = definitions.items();
  final IMaterials mats = definitions.materials();
  this.cellMappings = new HashMap<>( 4 );
  this.nonCellMappings = new HashMap<>( 5 );
  this.cellMappings.put( items.cell1k(), mats.cell1kPart() );
  this.cellMappings.put( items.cell4k(), mats.cell4kPart() );
  this.cellMappings.put( items.cell16k(), mats.cell16kPart() );
  this.cellMappings.put( items.cell64k(), mats.cell64kPart() );
  this.nonCellMappings.put( items.encodedPattern(), mats.blankPattern() );
  this.nonCellMappings.put( blocks.craftingStorage1k(), mats.cell1kPart() );
  this.nonCellMappings.put( blocks.craftingStorage4k(), mats.cell4kPart() );
  this.nonCellMappings.put( blocks.craftingStorage16k(), mats.cell16kPart() );
  this.nonCellMappings.put( blocks.craftingStorage64k(), mats.cell64kPart() );
}

private void registerFacadeRecipe( IDefinitions definitions, IModRegistry registry )
{
  Optional<Item> itemFacade = definitions.items().facade().maybeItem();
  Optional<ItemStack> cableAnchor = definitions.parts().cableAnchor().maybeStack( 1 );
  if( itemFacade.isPresent() && cableAnchor.isPresent() )
  {
    registry.addRecipeRegistryPlugin( new FacadeRegistryPlugin( (ItemFacade) itemFacade.get(), cableAnchor.get() ) );
  }
}

@Override
public void drawBG( final int offsetX, final int offsetY, final int mouseX, final int mouseY )
{
  super.drawBG( offsetX, offsetY, mouseX, mouseY );
  final IDefinitions definitions = AEApi.instance().definitions();
  definitions.items().cell1k().maybeStack( 1 ).ifPresent( cell1kStack -> this.drawItem( offsetX + 66 - 8, offsetY + 17, cell1kStack ) );
  definitions.blocks().drive().maybeStack( 1 ).ifPresent( driveStack -> this.drawItem( offsetX + 94 + 8, offsetY + 17, driveStack ) );
}

private boolean isPattern( final ItemStack output )
{
  if( output.isEmpty() )
  {
    return false;
  }
  final IDefinitions definitions = AEApi.instance().definitions();
  boolean isPattern = definitions.items().encodedPattern().isSameAs( output );
  isPattern |= definitions.materials().blankPattern().isSameAs( output );
  return isPattern;
}

@Override
public void registerItemSubtypes( ISubtypeRegistry subtypeRegistry )
{
  final Optional<Item> maybeFacade = AEApi.instance().definitions().items().facade().maybeItem();
  maybeFacade.ifPresent( subtypeRegistry::useNbtForSubtypes );
}

certusQuartz.add(AEApi.instance().definitions().materials().certusQuartzCrystalCharged().maybeStack(1).orElse(ItemStack.EMPTY));
certusQuartz.add(AEApi.instance().definitions().materials().purifiedCertusQuartzCrystal().maybeStack(1).orElse(ItemStack.EMPTY));
netherQuartz.add(AEApi.instance().definitions().materials().purifiedNetherQuartzCrystal().maybeStack(1).orElse(ItemStack.EMPTY));
        Ingredient.fromStacks(certusQuartz.toArray(new ItemStack[0])),
        'F',
        AEApi.instance().definitions().materials().fluixDust().maybeStack(1).orElse(ItemStack.EMPTY),
        'L',
        AEApi.instance().definitions().materials().logicProcessor().maybeStack(1).orElse(ItemStack.EMPTY)
    )));
ThEApi.instance().items().diffusionCore().maybeStack(2).ifPresent(stack ->
        Ingredient.fromStacks(netherQuartz.toArray(new ItemStack[0])),
        'F',
        AEApi.instance().definitions().materials().fluixDust().maybeStack(1).orElse(ItemStack.EMPTY),
        'L',
        AEApi.instance().definitions().materials().logicProcessor().maybeStack(1).orElse(ItemStack.EMPTY)
    )));
      Ingredient.fromStacks(certusQuartz.toArray(new ItemStack[0])),
      'P',
      AEApi.instance().definitions().materials().logicProcessor().maybeStack(1).orElse(ItemStack.EMPTY)
  ));
  this.addFakeCrafting(new ResourceLocation(ModGlobals.MOD_ID, "cells/essentia_cell_1k"));
      ThEApi.instance().items().essentiaComponent1k().maybeStack(1).orElse(ItemStack.EMPTY),
      'P',
      AEApi.instance().definitions().materials().calcProcessor().maybeStack(1).orElse(ItemStack.EMPTY),

@Override
public ItemStack getItemStackRepresentation()
{
  return AEApi.instance().definitions().parts().iface().maybeStack( 1 ).orElse( ItemStack.EMPTY );
}

private void registerCondenserRecipes( IDefinitions definitions, IModRegistry registry )
{
  ItemStack condenser = definitions.blocks().condenser().maybeStack( 1 ).orElse( ItemStack.EMPTY );
  if( condenser.isEmpty() )
  {
    return;
  }
  ItemStack matterBall = definitions.materials().matterBall().maybeStack( 1 ).orElse( ItemStack.EMPTY );
  if( !matterBall.isEmpty() )
  {
    registry.addRecipes( ImmutableList.of( CondenserOutput.MATTER_BALLS ), CondenserCategory.UID );
  }
  ItemStack singularity = definitions.materials().singularity().maybeStack( 1 ).orElse( ItemStack.EMPTY );
  if( !singularity.isEmpty() )
  {
    registry.addRecipes( ImmutableList.of( CondenserOutput.SINGULARITY ), CondenserCategory.UID );
  }
  if( !matterBall.isEmpty() || !singularity.isEmpty() )
  {
    registry.addRecipeCatalyst( condenser, CondenserCategory.UID );
    registry.handleRecipes( CondenserOutput.class, new CondenserOutputHandler( registry.getJeiHelpers().getGuiHelper(), matterBall, singularity ),
        CondenserCategory.UID );
  }
}

if( definitions.parts().iface().isSameAs( is ) )
  Optional<ItemStack> iface = definitions.blocks().iface().maybeStack( 1 );
  if( iface.isPresent() )

public static boolean isFluixEnabled() {
 return (AEApi.instance().definitions().materials().purifiedFluixCrystal().isEnabled()
   || AEApi.instance().definitions().materials().fluixCrystal().isEnabled()) && AEApi.instance().definitions().parts().quartzFiber().isEnabled();
}

public GuiCraftingStatus( final InventoryPlayer inventoryPlayer, final ITerminalHost te )
{
  super( new ContainerCraftingStatus( inventoryPlayer, te ) );
  this.status = (ContainerCraftingStatus) this.inventorySlots;
  final Object target = this.status.getTarget();
  final IDefinitions definitions = AEApi.instance().definitions();
  final IParts parts = definitions.parts();
  if( target instanceof WirelessTerminalGuiObject )
  {
    this.myIcon = definitions.items().wirelessTerminal().maybeStack( 1 ).orElse( ItemStack.EMPTY );
    this.originalGui = GuiBridge.GUI_WIRELESS_TERM;
  }
  if( target instanceof PartTerminal )
  {
    this.myIcon = parts.terminal().maybeStack( 1 ).orElse( ItemStack.EMPTY );
    this.originalGui = GuiBridge.GUI_ME;
  }
  if( target instanceof PartCraftingTerminal )
  {
    this.myIcon = parts.craftingTerminal().maybeStack( 1 ).orElse( ItemStack.EMPTY );
    this.originalGui = GuiBridge.GUI_CRAFTING_TERMINAL;
  }
  if( target instanceof PartPatternTerminal )
  {
    this.myIcon = parts.patternTerminal().maybeStack( 1 ).orElse( ItemStack.EMPTY );
    this.originalGui = GuiBridge.GUI_PATTERN_TERMINAL;
  }
}

  @Override
  public ItemStack getIconItemStack()
  {
    final Optional<Item> maybeFacade = AEApi.instance().definitions().items().facade().maybeItem();
    if( maybeFacade.isPresent() )
    {
      return ( (ItemFacade) maybeFacade.get() ).getCreativeTabIcon();
    }

    return new ItemStack( Blocks.PLANKS );
  }
}

@Override
public ItemStack getItemStackRepresentation()
{
  return AEApi.instance().definitions().parts().storageBus().maybeStack( 1 ).orElse( ItemStack.EMPTY );
}

final IMaterials materials = definitions.materials();
final IItems items = definitions.items();

final IBlocks blocks = definitions.blocks();
final IParts parts = definitions.parts();

@Override
public Item getItemDropped( final IBlockState state, final Random rand, final int fortune )
{
  return AEApi.instance()
      .definitions()
      .materials()
      .certusQuartzCrystalCharged()
      .maybeItem()
      .orElseThrow( () -> new MissingDefinitionException( "Tried to access charged certus quartz crystal, even though they are disabled" ) );
}

public MeteoritePlacer()
  final IBlocks blocks = AEApi.instance().definitions().blocks();

@Override
public ItemStack getIconItemStack()
{
  final IDefinitions definitions = AEApi.instance().definitions();
  final IBlocks blocks = definitions.blocks();
  final IItems items = definitions.items();
  final IMaterials materials = definitions.materials();
  return this.findFirst( blocks.controller(), blocks.chest(), blocks.cellWorkbench(), blocks.fluixBlock(), items.cell1k(), items.networkTool(),
      materials.fluixCrystal(), materials.certusQuartzCrystal(), materials.skyDust() );
}