src/Cli.php
public function arg($name, $description, $required = false) {
        $this->currentSchema[Cli::META][Cli::ARGS][$name] =
            ['description' => $description, 'required' => $required];
        return $this;
    }
public function arg($name, $description, $required = false) {
        $this->currentSchema[Cli::META][Cli::ARGS][$name] =
            ['description' => $description, 'required' => $required];
        return $this;
    }
public function arg ( $ name , $ description , $ required = false ) { $ this -> currentSchema [ Cli :: META ] [ Cli :: ARGS ] [ $ name ] = [ 'description' => $ description , 'required' => $ required ] ; return $ this ; }
Define an arg on the current command.

@param string $name The name of the arg.
@param string $description The arg description.
@param bool $required Whether or not the arg is required.
@return $this
Define an arg on the current command .