public function toUpperCase() {
    $token = $this->getConstantName()->lastToken();
    $token->setText(strtoupper($token->getText()));
    return $this;
  }
public function toUpperCase() {
    $token = $this->getConstantName()->lastToken();
    $token->setText(strtoupper($token->getText()));
    return $this;
  }
public function toUpperCase ( ) { $ token = $ this -> getConstantName ( ) -> lastToken ( ) ; $ token -> setText ( strtoupper ( $ token -> getText ( ) ) ) ; return $ this ; }
Convert the constant into uppercase.

@return $this
Convert the constant into uppercase .