ROLE

Purpose: To specify the participation role for the calendar user specified by the property in this case for the attendee. The possible values are defined in the enum Role Use e.g. Role.CHAIR.name to put a correct String value in this field. If no value (null) is passed for the Role, it will be interpreted as REQ-PARTICIPANT as according to the RFC. Other values are accepted and treated as REQ-PARTICIPANTs. see [https://tools.ietf.org/html/rfc5545#section-3.8.4.1] and [https://tools.ietf.org/html/rfc5545#section-3.2.16] Type: String