return;
return 0;
void doLineDown() {	if (isSingleLine()) {		return;	}	// allow line down action only if receiver is not in single line mode.	// fixes 4820.	if (caretLine < content.getLineCount() - 1) {		caretLine++;		if (isBidi()) {			caretOffset = getBidiOffsetAtMouseLocation(caretX, caretLine);		}		else {			caretOffset = getOffsetAtMouseLocation(caretX, caretLine);		}			}}