public static string FieldAsString(this Revision workItem, CoreField fieldRef)
 {
     return((workItem.Field(fieldRef) ?? string.Empty).ToString());
 }
 public static string FieldAsString(this Revision workItem, CoreField fieldRef, Func <object, Field, object> checker)
 {
     return((workItem.Field(fieldRef, checker) ?? string.Empty).ToString());
 }
 public static string FieldAsString(this Revision workItem, string fieldName)
 {
     return((workItem.Field(fieldName) ?? string.Empty).ToString());
 }