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Predicate meta_goal/2
 prolog:meta_goal(+Goal, -Pattern)[multifile, user_profile('home/swipl/src/swipl-devel/build/home/library/prolog_xref')]
Define meta-predicates. See the examples in this file for details.
 prolog:meta_goal(+Goal, -Pattern)[multifile, library(prolog_xref)]
Define meta-predicates. See the examples in this file for details.