code: public Stubbing createStubbing(final Charset defaultEncoding, final int defaultStatus,
              final MultiMap defaultHeaders) {
          
          return new Stubbing(defaultEncoding, defaultStatus, defaultHeaders);
      }
docs: Creates new stubbing instance.
  @param defaultEncoding default encoding of every stub response body
  @param defaultStatus default http status of every stub response
  @param defaultHeaders default response headers of every stub response
  @return new {@link Stubbing} instance