pre-installations and preparations

node_modules/@mui/material/ButtonGroup/ButtonGroupButtonContext.js

@@ -0,0 +1,9 @@
+import * as React from 'react';
+/**
+ * @ignore - internal component.
+ */
+const ButtonGroupButtonContext = /*#__PURE__*/React.createContext(undefined);
+if (process.env.NODE_ENV !== 'production') {
+  ButtonGroupButtonContext.displayName = 'ButtonGroupButtonContext';
+}
+export default ButtonGroupButtonContext;