Optional childrenOptional child nodes that belong to a top-level running item.
Optional classOptional CSS class name to add to the running item.
Optional contextOptional context hint to add to the data-context attribute of an item.
Optional detailCalled to determine the detail attribute, which is shown optionally in
a column after the label.
The LabIcon to use as the icon for the running item or the string
src URL.
Called to determine the label for each item.
Optional labelCalled to determine the title attribute for each item, which is
revealed on hover.
Optional openCalled when the running item is clicked.
Optional shutdownCalled when the shutdown button is pressed on a particular item.
A running item.