source_alias(?Alias, ?Options) is nondet[multifile, wordlist(config)]
Multifile hook that defines properties of file_search_path/2 aliases wrt. storage handling. Defined options are:
access(Access)
One of read or both.
search(Pattern)
The New Tab search form searches in files that satisfy the given pattern in the matching directories. Pattern is handed to expand_file_name/2.
 swish_config:source_alias(Alias, Options) is nondet[multifile, 'swish.pl']
Specify access for files below a given alias. Options define
access(Access)
One of read or both. Default is read.
if(Condition)
Provide additional conditions. Defined conditions are:
loaded
Only provide access to the file if it is loaded.