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beforeRemove

fires before removing an item from a tree collection

beforeRemove: (removedItem: any) => boolean | void;

Parameters:

removedItem: object - the object of an item to remove

Returns:

Return false to prevent removing of an item from a data collection; otherwise true.

Example

component.data.events.on("beforeRemove", function(removedItem){    console.log("An item will be removed");    return true;});