docstr: Get either the first gridding or the most recent successful gridding
docstr_tok: ["Get","either","the","first","gridding","or","the","most","recent","successful","gridding"]
code: def get_good_gridding(self, workspace):
      """Get either the first gridding or the most recent successful gridding"""
      d = self.get_dictionary()
      if not GOOD_GRIDDING in d:
          return None
      return d[GOOD_GRIDDING]
  
imports: import logging
  import centrosome.cpmorphology
  import numpy
  from cellprofiler_core.constants.measurement import COLTYPE_FLOAT
  from cellprofiler_core.constants.measurement import COLTYPE_INTEGER
  from cellprofiler_core.constants.measurement import IMAGE
  from cellprofiler_core.image import Image
  from cellprofiler_core.module import Module
  from cellprofiler_core.setting import Binary
  from cellprofiler_core.setting import Coordinates
  from cellprofiler_core.setting import ValidationError
  from cellprofiler_core.setting.choice import Choice
  from cellprofiler_core.setting.subscriber import ImageSubscriber
  from cellprofiler_core.setting.subscriber import LabelSubscriber
  from cellprofiler_core.setting.text import GridName
  from cellprofiler_core.setting.text import ImageName
  from cellprofiler_core.setting.text import Integer
  from cellprofiler_core.utilities.grid import Grid
label_desc: Use image node_id 16 for calling the DefineGrid obj's underlying member method code with example usage: obj.get_good_gridding(workspace) and returns: d, None