public function setUser($user)
    {
        $this->removeTarget();

        if ($user) {
            $this->user = (string) $user;
        }

        return $this;
    }
public function setUser($user)
    {
        $this->removeTarget();

        if ($user) {
            $this->user = (string) $user;
        }

        return $this;
    }
public function setUser ( $ user ) { $ this -> removeTarget ( ) ; if ( $ user ) { $ this -> user = ( string ) $ user ; } return $ this ; }
Set the user which the message should be sent to.

@param  string  $user
@return $this
Set the user which the message should be sent to .