docs: def load_schema(schema_path):
      """Prepare the api specification for request and response validation.
  
      :returns: a mapping from :class:`RequestMatcher` to :class:`ValidatorMap`
          for every operation in the api specification.
      :rtype: dict
      """
      with open(schema_path, 'r') as schema_file:
          schema = simplejson.load(schema_file)
      resolver = RefResolver('', '', schema.get('models', {}))
      return build_request_to_validator_map(schema, resolver)