docstr: Warn user re: Test mode 
docstr_tok: ["Warn","user","re",":","Test","mode"]
code: def validate_module_warnings(self, pipeline):
      """Warn user re: Test mode"""
      if self.each_or_all == EA_ALL_FIRST:
          raise ValidationError(
              "Pre-calculation of the illumination function is time-intensive, especially for Test Mode. The analysis will proceed, but consider using '%s' instead."
              % EA_ALL_ACROSS,
              self.each_or_all,
          )
  
imports: import centrosome.bg_compensate
  import centrosome.cpmorphology
  import centrosome.cpmorphology
  import centrosome.filter
  import centrosome.smooth
  import numpy
  import scipy.ndimage
  import skimage.filters
  from cellprofiler_core.image import AbstractImage
  from cellprofiler_core.image import Image
  from cellprofiler_core.measurement import Measurements
  from cellprofiler_core.module import Module
  from cellprofiler_core.pipeline import Pipeline
  from cellprofiler_core.setting import Binary
  from cellprofiler_core.setting import ValidationError
  from cellprofiler_core.setting.choice import Choice
  from cellprofiler_core.setting.subscriber import ImageSubscriber
  from cellprofiler_core.setting.text import Float
  from cellprofiler_core.setting.text import ImageName
  from cellprofiler_core.setting.text import Integer
label_desc: Use image node_id 19 for calling the CorrectIlluminationCalculate obj's underlying member method code with example usage: obj.validate_module_warnings(pipeline) without return types