@Override
    public String toString() {
        return MoreObjects.toStringHelper(this)
                          .omitNullValues()
                          .add("client", client)
                          .add("headers", headers)
                          .add("factoryWrapper", factoryWrapper)
                          .add("httpMethod", httpMethod)
                          .add("uri", uri)
                          .add("request", request)
                          .toString();
    }
Returns the {@link ClientRequestContext} associated with this request.
This method returns {@code null} until the request is sent.
A non-{@code null} value is available only after {@link #future()} is complete.
spring/spring6/src/main/java/com/linecorp/armeria/spring/internal/client/ArmeriaClientHttpRequest.java