package Ġm ary k . core . aggreg ations Ċ Ċ import Ġm ary k . core . properties . references . Is Property Reference Ċ Ċ type alias ĠValue By Property Reference < T > Ġ= Ġ( Is Property Reference < T , Ġ*, Ġ* >) Ġ-> ĠT ? Ċ