protected @Nullable ParameterValue getParameterValue(
            final @NonNull Parameter parameter,
            final @NonNull CommandContext<C> context
    ) {
        return null;
    }
Returns the value for the given {@code parameter}, if possible.

@param parameter parameter to get value for
@param context   the command context
@return the value, or {@code null}
cloud-annotations/src/main/java/org/incendo/cloud/annotations/method/AnnotatedMethodHandler.java