code: function(expression, depth){
        var t = this;
  
        // Determine a default depth
        depth = typeof depth === 'undefined' ? DEFAULT_DEPTH : depth;
  
        // Get the raw value
        var value = t._evaluate(expression);
  
        // Return the depth limited results
        return Monitor.deepCopy(value, depth);
      }
docs: Evaluate an expression, returning the depth-limited results
  
  @method eval_control
  @param expression {String} Expression to evaluate
  @param [depth=2] {Integer} Depth of the object to return
  @return value {Mixed} Returns the depth-limited value