Get a single optional argument from the command line. If more than one argument is given, return only the first. Return nil if none are given.
Invoke the command with the given list of normal arguments and additional build arguments.
Adds a section with title and content to the parser help view. Used for adding command arguments and default arguments.
Add the –clear-sources option
Sets up the resolution process @return [void]
@return [Object] the requirement that led to ‘requirement` being added
to the list of requirements.