package Ġcom . mobile health sport s . v accine pass . ui . introduction čĊč Ċ import Ġcom . mobile health sport s . v accine pass . presentation . services . Service Request č Ċ import Ġcom . mobile health sport s . v accine pass . presentation . services . messages . Message Request č Ċ import Ġcom . mobile health sport s . v accine pass . presentation . view models . Base ViewModel č Ċ import Ġcom . mobile health sport s . v accine pass . util . li ved ata . NonNull Mutable LiveData čĊč Ċ class ĠIntroduction ViewModel Ġ: ĠBase ViewModel () Ġ{ čĊĠĠĠ Ġval Ġmessage Request Ġ= ĠService Request < Message Request >() čĊčĊĠĠĠ Ġval Ġok Click Ġ= ĠNon Null Mutable LiveData ( false ) čĊčĊĠĠĠ Ġfun ĠonClick () Ġ{ čĊĠĠĠĠĠĠĠ Ġok Click . value Ġ= Ġtrue čĊĠĠĠ Ġ} č Ċ }