var less = {
    logLevel: 4,
    errorReporting: "console"
};
less.strictMath = true;
less.functions = {
  add: function(a, b) {
      return new(less.tree.Dimension)(a.value + b.value);
  },
  increment: function(a) {
      return new(less.tree.Dimension)(a.value + 1);
  },
  _color: function(str) {
      if (str.value === "evil red") {
          return new(less.tree.Color)("600");
      }
  }
};