docs: def make_field(self, field_name, field_body):
          """Fill content into nodes.
  
          :param string field_name: Field name of the field
          :param field_name: Field body if the field
          :type field_name: str or instance of docutils.nodes
          :return: field instance filled with given name and body
          :rtype: nodes.field
  
          """
          name = nodes.field_name()
          name += nodes.Text(field_name)
  
          paragraph = nodes.paragraph()
          if isinstance(field_body, str):
              # This is the case when field_body is just a string:
              paragraph += nodes.Text(field_body)
          else:
              # This is the case when field_body is a complex node:
              # useful when constructing nested field lists
              paragraph += field_body
  
          body = nodes.field_body()
          body += paragraph
  
          field = nodes.field()
          field.extend([name, body])
          return field