the usage of assignProperty in the worker-dashboard-component-context.ts

[dong-king]

the assignPropety function is added iterators parameter.

There are basically two ways to use:

const iterators =
            flowContext.dataContext.get(FLOW_ITERATOR_INDEXES_VARIABLE) || [];
assignProperty( flowState, this, "data", value, iterators);

and

// serial.tsx
context.assignProperty(
                "connection",
                {
                    id: serialConnection.id,
                    status: serialConnection.status
                },
                undefined
            );

What is the purpose of the parameter iterators?" When should I use FLOW_ITERATOR_INDEXES_VARIABLE to get iterators and when should I use undefined directly?