BlockInfo.java

public class BlockInfo {
  public final BlockPos pos;
  public final IBlockState state;
  public final NBTTagCompound tileData;
  
  public BlockInfo(BlockPos pos, IBlockState state, NBTTagCompound tileData) {
    this.pos = pos;           //relative block position
    this.state = state;       //blockstate at pos
    this.tileData = tileData; //this is null for most blocks
  }
}