question: public void placeItem ( ItemStack stack , BlockPos pos , World world , boolean centreItem ) { double offset = ( centreItem ) ? 0.5D : 0.0D ; EntityItem entityitem = new EntityItem ( world , ( double ) pos . getX ( ) + offset , ( double ) pos . getY ( ) + offset , ( double ) pos . getZ ( ) + offset , stack ) ; entityitem . motionX = 0 ; entityitem . motionY = 0 ; entityitem . motionZ = 0 ; entityitem . setDefaultPickupDelay ( ) ; world . spawnEntityInWorld ( entityitem ) ; }
target:  Spawn a single item at the specified position.