code: def get_ref_dict(self, schema):
          
          schema_key = make_schema_key(schema)
          ref_schema = build_reference(
              "schema", self.openapi_version.major, self.refs[schema_key]
          )
          if getattr(schema, "many", False):
              return {"type": "array", "items": ref_schema}
          return ref_schema
docs: Method to create a dictionary containing a JSON reference to the
          schema in the spec