railt/graphql

/**
 * --------------------------------------------------------------------------
 *  GraphQL SDL Interface Extensions
 * --------------------------------------------------------------------------
 *
 * Interface type extensions are used to represent an interface which has
 * been extended from some original interface. For example, this might be
 * used to represent common local data on many types, or by a GraphQL
 * service which is itself an extension of another GraphQL service.
 *
 * @see https://facebook.github.io/graphql/June2018/#sec-Interface-Extensions
 *
 */

InterfaceTypeExtension -> {
    return new Stmt\Extension\InterfaceTypeExtensionNode(
        $children[0],
        $children[1]->getArrayCopy(),
        $children[3]->getArrayCopy(),
        $children[2]->getArrayCopy(),
    );
}
  : ::T_EXTEND:: InterfaceTypeDefinitionExceptDescription()
  ;