const MODEL_PICKER_CONTENT_SELECTOR = "[data-model-picker-content]"; /** * Model-picker visibility is already represented by the mounted popover. * Shortcut arbitration reads that source directly instead of mirroring it in * a second React or external store. */export function isModelPickerOpen(): boolean {  return (    typeof document !== "undefined" &&    document.querySelector(MODEL_PICKER_CONTENT_SELECTOR) !== null  );}