InternalValidate method
Implementation
@override
void InternalValidate() {
super.InternalValidate();
EwsUtilities.ValidateParam(this._displayName, "DisplayName");
EwsUtilities.ValidateParamAllowNull(this._annotation, "Annotation");
EwsUtilities.ValidateParamAllowNull(
this._personaPostalAddress, "PersonaPostalAddress");
}