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F.2.21 library(predicate_options)
| assert_predicate_options/4 | As predicate_options(:PI, +Arg, +Options). | 
| check_predicate_option/3 | Verify predicate options at runtime. | 
| check_predicate_options/0 | Analyse loaded program for erroneous options. | 
| current_option_arg/2 | True when Arg of PI processes predicate options. | 
| current_predicate_option/3 | True when Arg of PI processes Option. | 
| current_predicate_options/3 | True when Options is the current active option declaration for PI on Arg. | 
| derive_predicate_options/0 | Derive new predicate option declarations. | 
| derived_predicate_options/1 | Derive predicate option declarations for a module. | 
| derived_predicate_options/3 | Derive option arguments using static analysis. | 
| predicate_options/3 | Declare that the predicate PI processes options on Arg. | 
| retractall_predicate_options/0 | Remove all dynamically (derived) predicate options. |