@Nullable
  public static Pair<PsiMethod, PsiSubstitutor> getOverriddenMethod(GrNamedArgument namedArgument) {
    return ContainerUtil.getFirstItem(getOverriddenMethodVariants(namedArgument), null);
  }
@Nullable
  public static Pair<PsiMethod, PsiSubstitutor> getOverriddenMethod(GrNamedArgument namedArgument)