package Ġv dt . hospital . scheduling Ċ Ċ import Ġorg . springframework . data . repository . reactive . Reactive Crud Repository Ċ import Ġorg . springframework . stereotype . Repository Ċ import Ġjava . time . Instant Ċ import Ġjava . util .* ĊĊ Ċ @ Repository Ċ interface ĠAppointment Repository Ġ: ĠReactive Crud Repository < Appointment , ĠUUID > Ġ{ ĊĊĠĠĠ Ġsuspend Ġfun Ġexists By Start Before Or End After ( start : ĠInstant , Ġend : ĠInstant ): ĠBoolean Ċ Ċ } ĊĊ