public ShenYuAfterEachSpecBuilder checker(final @NotNull Checker checker) {
            this.checker = checker;
            return this;
        }
builder set checker.
@param checker checker
@return ShenYuAfterEachSpecBuilder
shenyu-e2e/shenyu-e2e-engine/src/main/java/org/apache/shenyu/e2e/engine/scenario/specification/ShenYuAfterEachSpec.java