public IEnumerable <TTo> Map(IEnumerable <TFrom> from)
 {
     return(ClassMapper.MapIfNotNull(from, partialFrom => ClassMapper.MapIfNotNull(partialFrom, Map)));
 }
 public TTo Map(TFrom from)
 {
     return(ClassMapper.MapIfNotNull(from, MapOne));
 }
 public TTo Map(TFrom from, TTo defaultTo)
 {
     return(ClassMapper.MapIfNotNull(from, MapOne, defaultTo));
 }