
// // Copyright (c) 2007, Brian Frank and Andy Frank // Licensed under the Academic Free License version 3.0 // // History: // 21 Dec 07 Brian Frank Creation // ** ** UnknownThreadErr indicates an attempt to lookup an unknown thread. ** const class UnknownThreadErr : Err { ** ** Construct with specified error message and optional root cause. ** new make(Str msg := null, Err cause := null) }