Syntax:  SET PACKAGE ROUTINE EXPAND text_string defined_package

  Sets the prefix of a text processing utility (TPU) routine to define
  the expansion of routines in this package.

  When you expand a routine in a language associated with this package,
  LSE uses a TPU procedure named by this string followed by the languge
  name to generate a token for this routine.

  By default, this value is LSE$PKG_EXPAND_ROUT_.  LSE provides TPU
  routine expansion routines for the languages shipped with LSE.  For
  example, LSE$PKG_EXPAND_ROUTE_ADA is provided to expand Ada routine
  definitions.