@NotNull
  public static Set<String> getVariantsWithSameQualifier(@NotNull GrReferenceExpression refExpr,
                                                         @NotNull PrefixMatcher matcher,
                                                         @Nullable GrExpression qualifier) {
    return new CompleteReferencesWithSameQualifier(refExpr, matcher, qualifier).getVariantsWithSameQualifierImpl();
  }
@NotNull
  public static Set<String> getVariantsWithSameQualifier(@NotNull GrReferenceExpression refExpr,
                                                         @NotNull PrefixMatcher matcher,
                                                         @Nullable GrExpression qualifier)