default Consumer<String> testParameter(String name) {
        return null;
    }
Test if the given parameter that requires a value is accepted by the receiver.

<p>If the parameter is accepted, the receiver returns a Consumer that
receives the expected value, and it should store a stateful value to allow
the value to be later recalled. The CLI will skip the argument for further
processing.

@param name Name of the parameter to test.
@return Returns a consumer if accepted or null if rejected.
smithy-cli/src/main/java/software/amazon/smithy/cli/ArgumentReceiver.java