public Optional<Path> createPathToOutputMember(ToShapeId operationId, String memberName) {
        return createPathTo(operationId, memberName, RelationshipType.OUTPUT);
    }
Creates a {@code Path} to an operation output member if it exists.

@param operationId Operation to start from.
@param memberName Output member name to find in the operation output.
@return Returns the optionally found {@code Path} to the member.
smithy-model/src/main/java/software/amazon/smithy/model/selector/PathFinder.java