SP.WorkManagement.OM.CustomAttributeFilter.concatType property (sp.workmanagement)
How multiple attributes results are concatenated.
Applies to: apps for SharePoint | SharePoint Foundation 2013 | SharePoint Server 2013
var value = SP.WorkManagement.OM.CustomAttributeFilter.get_concatType()
SP.WorkManagement.OM.CustomAttributeFilter.set_concatType(value)