| name | type | direction | required | default value | description |
| separator | java.lang.String | in | ',' | The String to use when separating items. Defaults to , | |
| property | java.lang.String | in | null | The property of the items to display. If this is not specified, the toString() method will be called for each item. | |
| source | java.lang.Object | in |  | The items to display | |
