PublicShow -- Infer meta-predicate properties

This module infers meta-predicate properties by inspecting the clauses of predicates that call other predicates. This is extremely useful for program analysis and refactoring because many programs `in the wild' have incomplete or incorrect meta-predicate information.

See also
- This library is used by prolog_walk_code/1 to improve the accuracy of this analysis.
To be done
- Re-introduce some alias-analysis
- Not all missing meta-declarations are interesting. Notably, meta-predicates that are private and only pass meta-arguments on behalve of a public meta-predicates do not need a declaration.
Source inferred_meta_predicate(:Head, ?MetaSpec) is nondet
True when MetaSpec is an inferred meta-predicate specification for Head.
Source infer_meta_predicate(:Head, -MetaSpec) is semidet
True when MetaSpec is a meta-predicate specifier for the predicate Head. Derived meta-predicates are collected and made available through inferred_meta_predicate/2.