Error with UserConnection

I have a script that collects a data set using:

var oppProdQuery = new EntitySchemaQuery(UserConnection.EntitySchemaManager,"OpportunityProduct");

On publish, this is throwing an error:

'FlowEngine' is obsolete: '7.17.3 | Class is not in use and will be removed in upcoming releases. Use IProcessExecutor (UserConnection.ProcessEngine.ProcessExecutor) to start the processes.'

Can you advise how to fix?