public AceCommandDescription withMultiSelectAction(MultiSelectAction multiSelectAction) {
        this.multiSelectAction = multiSelectAction;
        return this;
    }
Chainable setter method for multiSelectAction property.

@param multiSelectAction multi-select action for this command (in
                         case it's null command is executed once without virtual changes
                         in selection ranges; otherwise see {@link MultiSelectAction} for
                         details)
@return reference to this command description
stroom-core-client-widget/src/main/java/edu/ycp/cs/dh/acegwt/client/ace/AceCommandDescription.java