Ends a task initiated by a do-node and returns to it.

Three return modes are possible:

• continue: Continues with the current task (flow).
• done: Goes to the next task (flow) or ends the flow (if no more tasks are defined) by sending the message to the done-output.
• abort: Skips all remaining tasks (flows) and directly exits at the done-output.

Save msg.payload as value: Only if you iterate through a collection (do -> each value mode)! This option let you decide if you want only read over your collection or to overwrite the current value with the current msg.payload.

Warning: If you change the index of an array (index-value pair), the value of the original index will be set to undefined. If you set the value of an object to undefined, the key will be deleted.