如何在react AG-grid中获取固定的行数据

import { AgGridReact, useGridReady } from 'ag-grid-react';

const MyGridComponent = () => {
  const [gridApi, setGridApi] = useState(null);
  const [columnDefs, setColumnDefs] = useState([...]); // 设置列定义
  const [rowData, setRowData] = useState([...]); // 设置行数据

  const onGridReady = useGridReady(params => {
    setGridApi(params.api);
  });

  return (
    <div className="ag-theme-alpine" style={{ height: '100%', width: '100%' }}>
      <AgGridReact
        columnDefs={columnDefs}
        rowData={rowData}
        onGridReady={onGridReady}
      />
    </div>
  );
};

const getFixedRowData = () => {
  if (gridApi) {
    const firstRowNode = gridApi.getRowNode('0'); // 获取第一行的行节点
    const firstRowData = firstRowNode.data; // 获取第一行的行数据
    console.log(firstRowData);
  }
};

<button onClick={getFixedRowData}>获取固定行数据</button>