public static FormFieldMultipleChoice AddField(this FormFieldMultipleChoice formField, FormField field)
 {
     formField.Value.Fields.Add(field);
     return(formField);
 }
 public static FormFieldTitle AddField(this FormFieldTitle formFieldTilte, FormField formField)
 {
     formFieldTilte.Value.Fields.Add(formField);
     return(formFieldTilte);
 }
 public static FormFieldMultipleChoice WithField(this FormFieldMultipleChoice formField, FormField field)
 {
     formField.Value.Fields = new List <FormField> {
         field
     };
     return(formField);
 }