to

Reference a constructor parameter or target property in lieu of a property reference, if it not exists as a property.

For example

to("name") fromProperty PersonDto::fullName

will generate an explicit mapping, setting constructor parameter name to PersonDto.fullName.

Alias for the target type TO to simply property references.

For example, suppose we are constructing a mapper with target type Person

to::name fromProperty PersonDto::fullName

is equivalent to Person::name fromProperty PersonDto::fullName.