Get the context ticket ID to move it to a different department using custom functions.

Get the context ticket ID to move it to a different department using custom functions.

Hi,
My goal is to move a ticket from one department to another on a field update, using custom functions.

I'm picturing the ticket as an object, so when I have it opened in front of me, and I want to apply the function to it, how do I pass the ticket ID argument to the function?

Basically the answer to this question is, what is the right variable to be used instead of {ticketid}?
OrgID and DepartmentID are static values, and I know where to get them.

response = zoho.desk.ticket.move(6x62x60x, {ticketid}, 4x74x700xx006x07);

Thank you.