code: public JsonFluentAssert isEqualTo(Object expected) {
          Diff diff = createDiff(expected, configuration);
          diff.failIfDifferent(description);
          return this;
      }
docs: Compares JSON for equality. The expected object is converted to JSON
  before comparison. Ignores order of sibling nodes and whitespaces.
  
  Please note that if you pass a String, it's parsed as JSON which can lead to an
  unexpected behavior. If you pass in "1" it is parsed as a JSON containing
  integer 1. If you compare it with a string it fails due to a different type.
  If you want to pass in real string you have to quote it "\"1\"" or use
  {@link #isStringEqualTo(String)}.
  
  If the string parameter is not a valid JSON, it is quoted automatically.
  
  @param expected
  @return {@code this} object.
  @see #isStringEqualTo(String)