public @Nullable PhysicalInfo resolveShooter(ProjectileSource source) {
  if (source instanceof Entity) {
    return entityTracker.resolveEntity((Entity) source);
  } else if (source instanceof BlockProjectileSource) {
    return blockTracker.resolveBlock(((BlockProjectileSource) source).getBlock());
  }
  return null;
}
 

@Override
public BlockProjectileSource getBlockProjectileSource() {
    Block block = getBlock();

    if (block.getType() != Material.DISPENSER) {
        return null;
    }

    return new CraftBlockProjectileSource((TileEntityDispenser) this.getTileEntityFromWorld());
}
 

@Override
public @Nullable PhysicalInfo resolveShooter(ProjectileSource source) {
    if(source instanceof Entity) {
        return entityTracker.resolveEntity((Entity) source);
    } else if(source instanceof BlockProjectileSource) {
        return blockTracker.resolveBlock(((BlockProjectileSource) source).getBlock());
    }
    return null;
}
 

public BlockProjectileSource getBlockProjectileSource() {
    Block block = getBlock();

    if (block.getType() != Material.DISPENSER) {
        return null;
    }

    return new CraftBlockProjectileSource(dispenser);
}
 

/**
 * Gets the BlockProjectileSource object for the dispenser.
 * <p>
 * If the block represented by this state is no longer a dispenser, this
 * will return null.
 *
 * @return a BlockProjectileSource if valid, otherwise null
 * @throws IllegalStateException if this block state is not placed
 */
public BlockProjectileSource getBlockProjectileSource();