docs: def _extract_assignment_text(self, element_id):
          """
          Extract assignment text (instructions).
  
          @param element_id: Element id to extract assignment instructions from.
          @type element_id: str
  
          @return: List of assignment text (instructions).
          @rtype: [str]
          """
          dom = get_page(self._session, OPENCOURSE_PROGRAMMING_ASSIGNMENTS_URL,
                         json=True,
                         course_id=self._course_id,
                         element_id=element_id)
  
          return [element['submissionLearnerSchema']['definition']
                  ['assignmentInstructions']['definition']['value']
                  for element in dom['elements']]