code: function Function(properties) {
                  if (properties)
                      for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                          if (properties[keys[i]] != null)
                              this[keys[i]] = properties[keys[i]];
              }
docs: Properties of a Function.
  @memberof perftools.profiles
  @interface IFunction
  @property {number|Long} [id] Function id
  @property {number|Long} [name] Function name
  @property {number|Long} [systemName] Function systemName
  @property {number|Long} [filename] Function filename
  @property {number|Long} [startLine] Function startLine
   
  Constructs a new Function.
  @memberof perftools.profiles
  @classdesc Represents a Function.
  @constructor
  @param {perftools.profiles.IFunction=} [properties] Properties to set