chr_show_store(+Mod)Prints all suspended constraints of module Mod to the
standard output. This predicate is automatically called by the
SWI-Prolog top level at the end of each query for every CHR module
currently loaded. The Prolog flag
chr_toplevel_show_store
controls whether the top level
shows the constraint stores. The value true
enables it. Any
other value disables it.