Copyright (C) 1994, Digital Equipment Corp.
<*PRAGMA LL*> INTERFACEAShTrestle ; IMPORT Filter, VBT;
ShTrestle.T
implements the shared Trestle instance above every
VBT, supporting attachment
TYPE T <: Public; Public = Trestle.T OBJECT METHODS init (ch: VBT.T) END;
END ShTrestle.