How to use

overrideMaster

method

in

slimeknights.mantle.multiblock.MultiServantLogic

 public static void assignMultiBlock(World world, BlockPos master, List<BlockPos> servants) {
  TileEntity masterBlock = world.getTileEntity(master);
  if(!(masterBlock instanceof IMasterLogic)) {
   throw new IllegalArgumentException("Master must be of IMasterLogic");
  }

  // assign master to each servant
  for(BlockPos pos : servants) {
   if(world.isBlockLoaded(pos)) {
    TileEntity slave = world.getTileEntity(pos);
    if(slave instanceof MultiServantLogic && slave.getWorld() != null) {
     ((MultiServantLogic) slave).overrideMaster(master);
     IBlockState state = world.getBlockState(pos);
     world.notifyBlockUpdate(pos, state, state, 3);
    }
   }
  }
 }
}

@Deprecated
public boolean setMaster(BlockPos pos) {
 if(!this.hasMaster || this.world.getBlockState(this.master) != this.state || (this.world
                                            .getBlockState(this.master)
                                            .getBlock() != this.masterBlock)) {
  this.overrideMaster(pos);
  return true;
 }
 else {
  return false;
 }
}

@Override
public boolean verifyMaster(IMasterLogic logic, World world, BlockPos pos) {
 if(this.hasMaster) {
  return this.hasValidMaster();
 }
 else {
  this.overrideMaster(pos);
  return true;
 }
}