//// Copyright (c) 2009, Brian Frank and Andy Frank// Licensed under the Academic Free License version 3.0//// History:// 14 May 09 Brian Frank Creation// 03 Feb 09 Brian Frank Rename from UnknownSymbolErr//**** UnknownFacetErr indicates an attempt to access an undefined facet.**const class UnknownFacetErr : Err {**** Construct with specified error message and optional root cause.**new make(Str msg := "", Err? cause := null) }