protected String buildFormatString(@Nullable final String name, @Nullable final String[] keys) {
        final String effectiveName = name == null ? _logEventName : name;
        final StringWriter stringWriter = new StringWriter();
        stringWriter.append("name=\"").append(effectiveName).append("\"");
        if (keys != null && keys.length > 0) {
            for (final String key : keys) {
                stringWriter.append(", ").append(key).append("=\"{}\"");
            }
        }
        return stringWriter.toString();
    }
protected String buildFormatString ( @ Nullable final String name , @ Nullable final String [ ] keys ) { final String effectiveName = name == null ? _logEventName : name ; final StringWriter stringWriter = new StringWriter ( ) ; stringWriter . append ( "name=\"" ) . append ( effectiveName ) . append ( "\"" ) ; if ( keys != null && keys . length > 0 ) { for ( final String key : keys ) { stringWriter . append ( ", " ) . append ( key ) . append ( "=\"{}\"" ) ; } } return stringWriter . toString ( ) ; }
Create a format <code>String</code> compatible with <code>MessageFormatter</code>.

@param name The name.
@param keys The argument keys.
@return The format <code>String</code>.