How to use

getFirstItem

method

in

appeng.api.storage.data.IItemList

@Override
public T getFirstItem()
{
  return this.target.getFirstItem();
}

if( anchor.isEmpty() )
  final IAEItemStack firstItem = itemList.getFirstItem();
  if( firstItem != null )

private boolean matches( final FullnessMode fm, final IMEInventory src )
{
  if( fm == FullnessMode.HALF )
  {
    return true;
  }
  final IItemList<? extends IAEStack> myList;
  if( src instanceof IMEMonitor )
  {
    myList = ( (IMEMonitor) src ).getStorageList();
  }
  else
  {
    myList = src.getAvailableItems( src.getChannel().createList() );
  }
  if( fm == FullnessMode.EMPTY )
  {
    return myList.isEmpty();
  }
  final IAEStack test = myList.getFirstItem();
  if( test != null )
  {
    test.setStackSize( 1 );
    return src.injectItems( test, Actionable.SIMULATE, this.mySrc ) != null;
  }
  return false;
}

private ItemStack doRemoveItems( final int amount, final ItemStack filter, final IInventoryDestination destination, final Actionable type )
{
  IAEItemStack req = null;
  if( filter.isEmpty() )
  {
    final IItemList<IAEItemStack> list = this.getList();
    if( !list.isEmpty() )
    {
      req = list.getFirstItem();
    }
  }
  else
  {
    req = AEItemStack.fromItemStack( filter );
  }
  IAEItemStack out = null;
  if( req != null )
  {
    req.setStackSize( amount );
    out = this.target.extractItems( req, type, this.src );
  }
  if( out != null )
  {
    return out.createItemStack();
  }
  return ItemStack.EMPTY;
}

IAEItemStack req = itemList.getFirstItem();
if( req instanceof IAEItemStack )

  return EnumActionResult.PASS;
IAEItemStack storageStack = (IAEItemStack) list.getFirstItem();
if (world.isAirBlock(pos.offset(facing)) && storageStack.getStackSize() != 0 && power >= 20.0D) {
  if (!world.isRemote) {

    .translateToLocal("extracells.tooltip.empty1");
IAEItemStack s = (IAEItemStack) list.getFirstItem();
return super.getItemStackDisplayName(stack) + " - "
  + s.createItemStack().getDisplayName();