Use

Consider the following code that derives an info value from the person observable:

const person = new observe.Object( { name: "Fran", age: 15 } );

const info = new Observation( function updateInfo() {
    return person.name + " is " + person.age;
} );

info.on( function onInfoChanged( newVal ) {
    console.log( "info changed" );
} );

queues.log();
person.age = 22;

.log() is used to log every task as it is enqueued and flushed. If queues.log() was called prior to person.age being set, the following would be logged:

NOTIFY enqueuing: Observation<updateInfo>.onDependencyChange ▶ { ... }
NOTIFY running  : Observation<updateInfo>.onDependencyChange ▶ { ... }
DERIVE enqueuing: Observation<updateInfo>.update ▶ { ... }
DERIVE running  : Observation<updateInfo>.update ▶ { ... }
MUTATE enqueuing: onInfoChanged ▶ { ... }
MUTATE running  : onInfoChanged ▶ { ... }

Typically, knowing when tasks are enqueued is not helpful for debugging so it's generally more useful to only log when tasks are flushed with:

queues.log( "flush" );