code: def _align_up(x, alignment):
      """Align x up to multiple of alignment"""
      return _div_ceil(x, alignment) * alignment
  
imports: import os
  from nvidia.dali._multiproc import shared_mem
  from nvidia.dali._multiproc.messages import ShmMessageDesc
  from nvidia.dali._utils.external_source_impl import assert_cpu_sample_data_type, sample_to_numpy
  import pickle
label_desc: Use image node_id 2 for calling a global function with example usage: _align_up(x, alignment) and returns: unknown