# Method Arg.OptLibrary()->Opt()->get_value()

Method get_value

  ``mixed` get_value(`array`(`string`) `argv`, `mapping`(`string`:`string`) `env`, `int`|`string` `previous`)`

Description

  Should return 1 for set options or a string containing the value of the option. Returning 0 means the option was not set (or matched). To properly chain arguments parsers, return `::get_value(argv, env, previous)` instead of `0`, unless you want to explicitly stop the chain and not set this option.