Behaviour on playMakers "Invoke Mthod"

So, I want to invoke a method of an object not existing in the scene yet. I use the “Find Game Object” and the “Invoke Method” but what is “Behaviour” in “Invoke Method”? It’s description says “Parameter: String” and its required. When I put the script name there I get the error:

Main Camera missing behaviour: LevelStarter

Behvaiour(String) is nothing but the Method Name you want to call.

like so,
Invoke("MyMethod", 5); // where 5 is the delay before the function is called.

also better check if object is active which can be done in various ways for example ,

if( GameObject.activeInHierarchy)
Invoke("MyMethod", 5);

function MyMethod()
{
 // MyMethod Actions to be performed after a delay of 5 seconds.
}

Main Camera missing behaviour: LevelStarter is because there is no Script known as LevelStarter attached to the Main Camera.