code: def get_measurement_columns(self, pipeline):
      return get_object_measurement_columns(self.output_object.value)
  
imports: import numpy
  import scipy.ndimage
  import skimage.morphology
  import skimage.segmentation
  from cellprofiler_core.module import Identify
  from cellprofiler_core.object import Objects
  from cellprofiler_core.setting.choice import Choice
  from cellprofiler_core.setting.subscriber import LabelSubscriber
  from cellprofiler_core.setting.text import LabelName
  from cellprofiler_core.utilities.core.module.identify import add_object_count_measurements
  from cellprofiler_core.utilities.core.module.identify import get_object_measurement_columns
  from cellprofiler_core.utilities.core.module.identify import add_object_location_measurements
  from cellprofiler_library.modules import combineobjects
label_desc: Use image node_id 9 for calling the CombineObjects obj's underlying member method code with example usage: obj.get_measurement_columns(pipeline) and returns: get_object_measurement_columns