Lookup multi-select fields are triggered in the field.edit.after stage.

Parameters

Parameter	Description	Type
fieldName	api_name of the field that triggered the event	String
objApiName	api_name of the object that triggered the event	String
dataIndex	dataIndex of the record that triggered the event, used for detail-object data	String
changeData	All field data changed by this edit action	Object
lookupDatas	Selected lookup object data	Object

Return Value

Parameter	Description	Type
notTriggerCalUi	Specifies that this calculation/UI event should not be triggered	Boolean
extraCalUiParams	Parameters used to customize the upcoming calculation/UI event logic	Object