docs: def create_blueprint(state):
      """Create blueprint serving JSON schemas.
  
      :param state: :class:`invenio_jsonschemas.ext.InvenioJSONSchemasState`
          instance used to retrieve the schemas.
      """
      blueprint = Blueprint(
          'invenio_jsonschemas',
          __name__,
      )
  
      @blueprint.route('/<path:schema_path>')
      def get_schema(schema_path):
          """Retrieve a schema."""
          try:
              schema_dir = state.get_schema_dir(schema_path)
          except JSONSchemaNotFound:
              abort(404)
  
          resolved = request.args.get(
              'resolved',
              current_app.config.get('JSONSCHEMAS_RESOLVE_SCHEMA'),
              type=int
          )
  
          with_refs = request.args.get(
              'refs',
              current_app.config.get('JSONSCHEMAS_REPLACE_REFS'),
              type=int
          ) or resolved
  
          if resolved or with_refs:
              schema = state.get_schema(
                  schema_path,
                  with_refs=with_refs,
                  resolved=resolved
              )
              return jsonify(schema)
          else:
              return send_from_directory(schema_dir, schema_path)
  
      return blueprint