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\begin{summarylist}{ll}
\predicatesummary{opt_arguments}{3}{Extract commandline options according to a specification.}
\predicatesummary{opt_help}{2}{True when Help is a help string synthesized from OptsSpec.}
\predicatesummary{opt_parse}{4}{Equivalent to opt_parse(OptsSpec, ApplArgs, Opts, PositionalArgs, \Snil{}).}
\predicatesummary{opt_parse}{5}{Parse the arguments Args (as list of atoms) according to OptsSpec.}
\predicatesummary{parse_type}{3}{Hook to parse option text Codes to an object of type Type.}
\end{summarylist}