code: def usages(self):
          
          row, col = self.editor.cursor()
          self.log.debug('usages: in')
          self.call_options[self.call_id] = {
                  "word_under_cursor": self.editor.current_word(),
                  "false_resp_msg": "Not a valid symbol under the cursor"}
          self.send_at_point("UsesOfSymbol", row, col)
docs: Request usages of whatever at cursor.