def run(self):
        """A command's raison d'etre: carry out the action it exists to
        perform, controlled by the options initialized in
        'initialize_options()', customized by other commands, the setup
        script, the command-line, and config files, and finalized in
        'finalize_options()'.  All terminal output and filesystem
        interaction should be done by 'run()'.

        This method must be implemented by all command classes.
        """
        raise RuntimeError(
            "abstract method -- subclass %s must override" % self.__class__
        )
A command's raison d'etre: carry out the action it exists to
        perform, controlled by the options initialized in
        'initialize_options()', customized by other commands, the setup
        script, the command-line, and config files, and finalized in
        'finalize_options()'.  All terminal output and filesystem
        interaction should be done by 'run()'.

        This method must be implemented by all command classes.
        
product/gradle-plugin/src/main/python/setuptools/_distutils/cmd.py