Check if agent connected to an agent is on the wait block - anylogic - simulation

Question

Direct question: how to check if an agent is waiting in the wait block?
More details? below, thank you.
I was following Mr. Felipe's answer to a similar question (this one: Anylogic - Combined multiple items back to original owner )
On step number 4 of his answer, he said " On the passengerWait, on the onEnter action you will check if all the bags connected to the passenger are on the bagWait block... if they are... then you will free (wait.free(agent)) the passenger and the bags "
Do you know how to check this? I have the same problem between single patient and single drug.

Answer 1

To avoid going into the details of your model and naming of blocks, I will provide you with something generic that should help you achieve what you need.
The first step is to know how to iterate through the agents inside the wait block. To do that, you need a for loop with the syntax shown in the code below. (Replace Agent with the agent type of agents in the wait block, replace waitBlock with you wait block's name.)
The character a now refers to the agent in the wait block being evaluated in each iteration.
Now, you just add your condition where you check if any of the agents in the wait block match your condition which is whether they are equal to whichever connected agent to the one going through the wait block.
Agent x = null;
for( Agent a : waitBlock ) {
if( a.equals(agent.agentLink.getConnectedAgent()) ) {
x = a ;
break;
}
}
if( x != null ) {
waitBlock.free( x );
}
Another simplified code would be:
Agent x = findFirst( waitBlock , a -> a.equals(agent.agentLink.getConnectedAgent()) );
if( x != null ) {
waitBlock.free(x);
}

Answer 2

I figured out how to do that:
Make a new variable in the Passenger agent and call it
variable_IsWaitingForBag
Make a new variable in the Bag agent and call it variable_IsWaitingForPassenger
In onEnter of passengerWait, use the following:
if(agent.agentLink_myBag.getConnectedAgent().variable_IsWaitingForPassenger)
{
passengerWait.free(agent);
bagWait.free(agent.agentLink_myPassenger.getConnectedAgent());
}
agent.variable_IsWaitingForBag=true;
Do the opposite in onEnter of the bagWait block