private boolean isSideEffectFreeBuilderMethodCall(PsiMethodCallExpression call) {
      PsiReferenceExpression methodExpression = call.getMethodExpression();
      return !"getChars".equals(methodExpression.getReferenceName()) &&
             ExpressionUtils.isReferenceTo(methodExpression.getQualifierExpression(), variable);
    }
private boolean isSideEffectFreeBuilderMethodCall(PsiMethodCallExpression call)