state-as-subject.kt

val state = BehaviourSubject.create<State>()

nameInput.withLatestFrom(state) { name, state ->
 state.copy(name = name) 
}
.subscribe(state)

checkBoxChecks.withLatestFrom(state) { сbState, state →thLa
 state.copy(checkBoxCheched = cbState) 
}
.subscribe(state)

database.dao().loadById(…).map { somethingFromDb ->
 State(…) 
}
.subscribe(state)