public Optional<ObjectNode> getParams() {
        return Optional.ofNullable(this.params);
    }
Get the input parameters of this test case.

<p>These parameters, if present, are passed to the operation the smoke test
targets. If not present, the operation does not have any input.

@return Returns the optionally present input parameters.
smithy-smoke-test-traits/src/main/java/software/amazon/smithy/smoketests/traits/SmokeTestCase.java