private void _addFeatureOnce(Object name, Feature feature) {
        String _name = String.valueOf(name);
        if (!this.feature().containsKey(_name)) {
            this.feature().put(_name, feature);
        }
    }
private void _addFeatureOnce ( Object name , Feature feature ) { String _name = String . valueOf ( name ) ; if ( ! this . feature ( ) . containsKey ( _name ) ) { this . feature ( ) . put ( _name , feature ) ; } }
同一种组件只添加一次

@param name
@param feature