ExtraFieldTool class

Get/set extra field APIs.

Signature:

export declare class ExtraFieldTool extends BasicTool

Extends: BasicTool

Methods

Method	Modifiers	Description
getExtraField(item, key)		Get extra field value by key. If it does not exists, return undefined.
getExtraFields(item, backend)		Get all extra fields
replaceExtraFields(item, fields)		Replace extra field of an item.
setExtraField(item, key, value)		Set an key-value pair to the item's extra field