private void checkSetterNeeded(final PsiExpression operand, final PsiJavaToken sign) {
      final IElementType tokenType = sign.getTokenType();
      if (!tokenType.equals(JavaTokenType.PLUSPLUS) && !tokenType.equals(JavaTokenType.MINUSMINUS)) {
        return;
      }
      if (isProhibitedReference(operand)) {
        final PsiField field = getReferencedField(operand);
        if (!hasSetter(field) && !isStaticFinal(field)) {
          fieldsNeedingSetter.add(field);
        }
      }
    }
private void checkSetterNeeded(final PsiExpression operand, final PsiJavaToken sign)