public ShenYuTestCaseSpecBuilder add(final WebSocketVerifier webSocketVerifier) {
            webSocketBuilder.add(webSocketVerifier);
            return this;
        }
websocket builder add verifier.
@param webSocketVerifier webSocketVerifier
@return ShenYuTestCaseSpecBuilder
shenyu-e2e/shenyu-e2e-engine/src/main/java/org/apache/shenyu/e2e/engine/scenario/specification/ShenYuCaseSpec.java