public function setArgument($argument, $value)
    {
        Arr::set($this->arguments, $argument, $value);

        return $this;
    }
public function setArgument($argument, $value)
    {
        Arr::set($this->arguments, $argument, $value);

        return $this;
    }
public function setArgument ( $ argument , $ value ) { Arr :: set ( $ this -> arguments , $ argument , $ value ) ; return $ this ; }
Sets the value of argument.

@param string $argument
@param mixed $value

@return self
Sets the value of argument .