// The returned cache will always be valid, but may not be updated from the existing.
// Before each operation sleepDuration is called which can be used to temporarily halt the scanner.
// If the supplied context is canceled the function will return at the first chance.

  }

  /** Returns the domain name, normalized to all lower case. */
  @Override
  public String toString() {
    return name;
  }

  /**
   * Equality testing is based on the text supplied by the caller, after normalization as described
   * in the class documentation. For example, a non-ASCII Unicode domain name and the Punycode
   * version of the same domain name would not be considered equal.
   */

     */
    fun Response.varyHeaders(): Headers {
      // Use the request headers sent over the network, since that's what the response varies on.
      // Otherwise OkHttp-supplied headers like "Accept-Encoding: gzip" may be lost.
      val requestHeaders = networkResponse!!.request.headers
      val responseHeaders = headers
      return varyHeaders(requestHeaders, responseHeaders)
    }

following conditions.

  a. Attribution.

       1. If You Share the Licensed Material (including in modified
          form), You must:

            a. retain the following if it is supplied by the Licensor
               with the Licensed Material:

                 i. identification of the creator(s) of the Licensed
                    Material and any others designated to receive

   *   (arg1, arg2) -> System.out.println(arg1 + ":" + arg2)
   * }
   *
   * <p>will print:
   *
   * {@snippet :
   * foo1:bar1
   * foo2:bar2
   * }
   *
   * <p><b>Warning:</b> If either supplied stream is a parallel stream, the same correspondence
   * between elements will be made, but the order in which those pairs of elements are passed to the
   * consumer is <i>not</i> defined.
   *

    checkArgument(padding >= 0, "Invalid padding: %s", padding);
    return (array.length < minLength) ? Arrays.copyOf(array, minLength + padding) : array;
  }

  /**
   * Returns a string containing the supplied {@code int} values separated by {@code separator}. For
   * example, {@code join("-", 1, 2, 3)} returns the string {@code "1-2-3"}.
   *

    checkArgument(padding >= 0, "Invalid padding: %s", padding);
    return (array.length < minLength) ? Arrays.copyOf(array, minLength + padding) : array;
  }

  /**
   * Returns a string containing the supplied {@code char} values separated by {@code separator}.
   * For example, {@code join("-", '1', '2', '3')} returns the string {@code "1-2-3"}.
   *

    checkArgument(padding >= 0, "Invalid padding: %s", padding);
    return (array.length < minLength) ? Arrays.copyOf(array, minLength + padding) : array;
  }

  /**
   * Returns a string containing the supplied {@code float} values, converted to strings as
   * specified by {@link Float#toString(float)}, and separated by {@code separator}. For example,
   * {@code join("-", 1.0f, 2.0f, 3.0f)} returns the string {@code "1.0-2.0-3.0"}.

    checkArgument(padding >= 0, "Invalid padding: %s", padding);
    return (array.length < minLength) ? Arrays.copyOf(array, minLength + padding) : array;
  }

  /**
   * Returns a string containing the supplied {@code double} values, converted to strings as
   * specified by {@link Double#toString(double)}, and separated by {@code separator}. For example,
   * {@code join("-", 1.0, 2.0, 3.0)} returns the string {@code "1.0-2.0-3.0"}.

    checkArgument(padding >= 0, "Invalid padding: %s", padding);
    return (array.length < minLength) ? Arrays.copyOf(array, minLength + padding) : array;
  }

  /**
   * Returns a string containing the supplied {@code long} values separated by {@code separator}.
   * For example, {@code join("-", 1L, 2L, 3L)} returns the string {@code "1-2-3"}.
   *