code: def planewise_morphology_opening(x_data, structuring_element):
      y_data = numpy.zeros_like(x_data)
  
      for index, plane in enumerate(x_data):
          y_data[index] = skimage.morphology.opening(
              plane, structuring_element
          )
  
      return y_data
  
file_path: CellProfiler/src/frontend/cellprofiler/modules/opening.py
imports: from cellprofiler_core.module import ImageProcessing
  from cellprofiler_core.setting import StructuringElement
  from cellprofiler_library.modules import opening
  from cellprofiler.modules._help import HELP_FOR_STREL
label_desc: Use image node_id 1 for calling a global function with example usage: planewise_morphology_opening(x_data, structuring_element) and returns: y_data