code: def on_btn_add_fit(self, event):
          
          if self.auto_save.GetValue():
              self.current_fit = self.add_fit(self.s, None, None, None, saved=True)
          else:
              self.current_fit = self.add_fit(self.s, None, None, None, saved=False)
          self.generate_warning_text()
          self.update_warning_box()
  
          if self.ie_open:
              self.ie.update_editor()
  
          self.update_fit_boxes(True)
          # Draw figures and add  text
          self.get_new_PCA_parameters(event)
docs: add a new interpretation to the current specimen
  
          Parameters
          ----------
          event : the wx.ButtonEvent that triggered this function
  
          Alters
          ------
          pmag_results_data