public static PsiExpression @NotNull [] findReferenceExpressions(PsiElement scope, PsiElement referee) {
    if (scope == null) return PsiExpression.EMPTY_ARRAY;
    List<PsiExpression> array = new ArrayList<>();
    addReferenceExpressions(array, scope, referee);
    return array.toArray(PsiExpression.EMPTY_ARRAY);
  }
public static PsiExpression @NotNull [] findReferenceExpressions(PsiElement scope, PsiElement referee)