@Nullable
  private static PsiAssignmentExpression findNextAssignment(@Nullable PsiElement element, @NotNull PsiVariable variable) {
    PsiElement candidate = skipWhitespacesAndCommentsForward(element);
    return findAssignment(candidate, variable);
  }
@Nullable
  private static PsiAssignmentExpression findNextAssignment(@Nullable PsiElement element, @NotNull PsiVariable variable)