public Set<OperationShape> getOutputBindings(ToShapeId output) {
        return SetUtils.copyOf(boundOutputOperations.getOrDefault(output.toShapeId(), Collections.emptySet()));
    }
Gets all the operations that bind the given shape as output.

@param output The structure that may be used as output.
@return Returns a set of operations that bind the given output shape.
smithy-model/src/main/java/software/amazon/smithy/model/knowledge/OperationIndex.java