less.js/test/plugins/visitor/index.js

(function(exports) {
    var RemoveProperty = function(less) {
        this._visitor = new less.visitors.Visitor(this);
    };

    RemoveProperty.prototype = {
    isReplacing: true,
    run: function (root) {
        return this._visitor.visit(root);
    },
    visitRule: function (ruleNode, visitArgs) {
        if (ruleNode.name != '-some-aribitrary-property')
        {
            return ruleNode;
        }
        else {
            return [];
        }
    }
    };

    exports.install = function(less, pluginManager) {
        pluginManager.addVisitor( new RemoveProperty(less));
    };

})(typeof exports === 'undefined' ? this['VisitorPlugin'] = {} : exports);