docs: def tree_analysisOutput(self, *args, **kwargs):
          """
          An optional method for looping over the <outputTree> and
          calling an outputcallback on the analysis results at each
          path.
  
          Only call this if self.b_persisAnalysisResults is True.
          """
          fn_outputcallback           = None
          for k, v in kwargs.items():
              if k == 'outputcallback':           fn_outputcallback           = v
          index   = 1
          total   = len(self.d_inputTree.keys())
          for path, d_analysis in self.d_outputTree.items():
              self.simpleProgress_show(index, total)
              self.dp.qprint("Processing analysis results in output: %s" % path)
              d_output        = fn_outputcallback((path, d_analysis), **kwargs)
          return {
              'status':   True
          }