code: def transfer_bandwidth(
      queue, transfer_type, block_size, timer_factory=None
  ):
      """Measures one-sided bandwidth."""
  
      transfer = transfer_type(queue, block_size)
      return block_size / _get_time(
          queue, transfer.do, timer_factory=timer_factory
      )
  
imports: import pyopencl
  import numpy
label_desc: Use image node_id 3 for calling a global function with example usage: transfer_bandwidth(queue, transfer_type, block_size, timer_factory) and returns: unknown