Foldable block that can be expanded to show more controls by checking the checkbox. Name of the checkbox. Can be used by the server to determine if the block is collapsed or expanded at the time of submission. Note that when the block is collapsed, none of its child controls will send the values to the server (unlike <f:advanced>) Human readable text that follows the checkbox. Used for databinding. TBD. Either this or @name/@title combo is required. initial checkbox status. true/false. If present, the (?) icon will be rendered on the right to show inline help. See @help for <f:entry>. if present, the foldable section expands when the checkbox is unchecked. if present, the foldable section will not be grouped into a separate JSON object upon submission If present, Redo icon will rendered and Reset will be available. if present and true - value is overridden Help for feature: ${title}