public Optional<ShapeId> getVendorParamsShape() {
        return Optional.ofNullable(this.vendorParamsShape);
    }
Get the shape ID of vendor-specific parameters used by this test case.

<p>If present, {@link #getVendorParams()} will match this shape's definition.

@see #getVendorParams()
@return The optionally present shape ID of vendor-specific parameters.
smithy-smoke-test-traits/src/main/java/software/amazon/smithy/smoketests/traits/SmokeTestCase.java