Optional
Renders the tree-expander button. The default renders a plain <button className="dtbl-expander">; override this to use your design system's icon button (e.g. MUI's <IconButton size="large">).
<button className="dtbl-expander">
<IconButton size="large">
Default theme for tables/lists in this subtree (see theme.ts). A component's own theme prop takes precedence.
theme.ts
theme
Renders the tree-expander button. The default renders a plain
<button className="dtbl-expander">; override this to use your design system's icon button (e.g. MUI's<IconButton size="large">).