The Vega specification code from which datasets and signals will be extracted for export.
When true, the export modal is open and visible to the user. When false, the modal is closed and hidden.
Callback function that is called when the export modal is closed. This allows the parent component to control the visibility of the modal.
Callback function that is called when the user confirms the export action.
The exported data containing the selected datasets and signals, which is passed to the parent component for further handling.
Props for ExternalSelectionExporter.