code: def source(self):
      if self._source:
          return self._source
      if self.nodes:
          node = self.nodes[0]
          return node and node.loc and node.loc.source
  
file_path: wandb/wandb/vendor/graphql-core-1.1/wandb_graphql/error/base.py
imports: from ..language.location import get_location
label_desc: Use image node_id 2 for calling the GraphQLError obj's underlying member method code with example usage: obj.source() and returns: self, unknown