src/Command.php
public function action(callable $value = null)
    {
        if (null === $value) {
            return $this->action;
        }
        $this->action = $value;
        return $this;
    }
public function action(callable $value = null)
    {
        if (null === $value) {
            return $this->action;
        }
        $this->action = $value;
        return $this;
    }
public function action ( callable $ value = null ) { if ( null === $ value ) { return $ this -> action ; } $ this -> action = $ value ; return $ this ; }
action getter and setter.

@param  callable
@return mixed
action getter and setter .