StyledTextBidi.removeOrientationListener(this);
void handleDispose() {	clipboard.dispose();	ibeamCursor.dispose();	if (renderer != null) {		renderer.dispose();		renderer = null;	}	if (content != null) {		content.removeTextChangeListener(textChangeListener);	}		if (leftCaretBitmap != null) {		leftCaretBitmap.dispose();		leftCaretBitmap = null;	}	if (rightCaretBitmap != null) {		rightCaretBitmap.dispose();		rightCaretBitmap = null;	}	if (isBidi()) {		StyledTextBidi.removeLanguageListener(this);	}	StyledTextBidi.removeOrientationListener(this);}