function TakeObservable(source, count) {
      this.source = source;
      this._count = count;
      __super__.call(this);
    }
Bypasses elements in an observable sequence as long as a specified condition is true and then returns the remaining elements.
 The element's index is used in the logic of the predicate function.

 var res = source.skipWhile(function (value) { return value < 10; });
 var res = source.skipWhile(function (value, index) { return value < 10 || index < 10; });
@param {Function} predicate A function to test each element for a condition; the second parameter of the function represents the index of the source element.
@param {Any} [thisArg] Object to use as this when executing callback.
@returns {Observable} An observable sequence that contains the elements from the input sequence starting at the first element in the linear series that does not pass the test specified by predicate.