How to use

notifyChange

method

in

slimeknights.mantle.multiblock.IMasterLogic

TileEntity servant = worldIn.getTileEntity(pos);
if(servant instanceof IServantLogic) {
 ((IMasterLogic) te).notifyChange((IServantLogic) servant, pos);
 break;

@Override
public void notifyMasterOfChange() {
 if(this.hasValidMaster()) {
  IMasterLogic logic = (IMasterLogic) this.world.getTileEntity(this.master);
  logic.notifyChange(this, this.pos);
 }
}