[Projections][Events] Question about correlating events for a composite projection in Marten

[rafilsk0]

Hi everyone,
I’m trying to create a composite projection in Marten that correlates two different events but I’m struggling to achieve the desired result.
Here are the events I have:

Event1
{
  "Code": "E1-123",
  "Name": "Event One"
}

Event2
{
  "Code": "E2-456",
  "Name": "Event Two",
  "EventExample1Code": "E1-123"
}

I want to create a projection that, when processing these events, builds the following final object:

ProjectionExample
{
  "Event2Code": "E2-456",
  "Event2Name": "Event Two",
  "Event1Details": {
    "Event1Code": "E1-123",
    "Event1Name": "Event One"
  }
}

The event flow is:

1 - First, Event1 is dispatched.
2 - Later, Event2 is dispatched, which contains a reference to Event1 via EventExample1Code.

Problem:

I’m unable to correlate these events to build the final composite projection.
What is the best approach to correlate events in Marten to build a projection that depends on data from previous events?

Is there a recommended way to store or reference data from earlier events inside a Marten projection?
How should I properly correlate these events to create the desired structure?

[rafilsk0]

Help please ?