@Nullable
  static RefElement parameterFromExternalName(final RefManager manager, final String fqName) {
    final int idx = fqName.lastIndexOf(' ');
    if (idx > 0) {
      final String method = fqName.substring(0, idx);
      final RefJavaElement refMethod = RefMethodImpl.methodFromExternalName(manager, method);
      if (refMethod != null) {
        final UMethod element = ObjectUtils.tryCast(refMethod.getUastElement(), UMethod.class);
        if (element == null) return null;
        final List<UParameter> parameters = element.getUastParameters();
        int paramIdx = 0;
        final String paramName = fqName.substring(idx + 1);
        for (UParameter parameter : parameters) {
          final String name = parameter.getName();
          if (name != null && name.equals(paramName)) {
            return manager.getExtension(RefJavaManager.MANAGER).getParameterReference(parameter, paramIdx, refMethod);
          }
          paramIdx++;
        }
      }
    }
    return null;
  }
@Nullable
  static RefElement parameterFromExternalName(final RefManager manager, final String fqName)