code: function Annotation(properties) {
                      this.path = [];
                      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 an Annotation.
  @memberof google.protobuf.GeneratedCodeInfo
  @interface IAnnotation
  @property {Array.<number>|null} [path] Annotation path
  @property {string|null} [sourceFile] Annotation sourceFile
  @property {number|null} [begin] Annotation begin
  @property {number|null} [end] Annotation end
   
  Constructs a new Annotation.
  @memberof google.protobuf.GeneratedCodeInfo
  @classdesc Represents an Annotation.
  @implements IAnnotation
  @constructor
  @param {google.protobuf.GeneratedCodeInfo.IAnnotation=} [properties] Properties to set