Flattening into simpler model

[tenhobi]

Is your feature request related to a problem? Please describe.
Implement a flattening feature for mapping similar to https://docs.automapper.org/en/stable/Flattening.html

Describe the solution you'd like
The mapping would flatten source properties automatically or with an enabled flag into target properties.

• get* prefix
• object flattening

Maybes:

• make it work for also set* prefix?