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kotlinlang

since i do not really know how to ask the question (with limited knowledge)
how can i setup exposed, squash or any other database library to write and save data classes that may have lists of, maps of or just references to other data classes (i assume multiple tables)
and have this accessible in a single function to store and retrieve objects,
is there automatic shortcuts or would i have to reconstruct the objects along with retrieving the contained info manually ?
does anyone have some example code?