public WithJsonPath(JsonPath jsonPath, Matcher<T> resultMatcher) {
        this.jsonPath = jsonPath;
        this.resultMatcher = resultMatcher;
    }
@Test
    public void shouldMatchExistingStringJsonPath() {
        assertThat(BOOKS_JSON, withJsonPath("$.expensive"));
        assertThat(BOOKS_JSON, withJsonPath("$.store.bicycle"));
        assertThat(BOOKS_JSON, withJsonPath("$.store.book[2].title"));
        assertThat(BOOKS_JSON, withJsonPath("$.store.book[*].author"));
    }