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(function (tree) {
tree.Paren = function (node) {
this.value = node;
};
tree.Paren.prototype = {
toCSS: function (env) {
return '(' + this.value.toCSS(env) + ')';
},
eval: function (env) {
return new(tree.Paren)(this.value.eval(env));
}
};
})(require('../tree'));
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