True if the predicate specified by Pred is owned by file
File, where File is an absolute path name (see
Can be used with any instantiation pattern, but the database only
maintains the source file for each predicate. If
Pred is a multifile predicate this predicate
succeeds for all files that contribute clauses to Pred.48The
current implementation performs a linear scan through all clauses to
establish this set of files. See also clause_property/2.
Note that the relation between files and predicates is more complicated
is used. The predicate describes the owner of the predicate.
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