Cannot read property 'isKey' of undefined in BootStrapTable

In my case  it was because of
`<TableHeaderColumn dataField='AgentName' >Name</TableHeaderColumn></BootstrapTable>`  in which BootstrapTable's  Closing tag was on a same line .
it should be there on a new independent line.

See Below  Example:

#Wrong Implementation:
 <BootstrapTable
            data={products}
            options={options}
            pagination={true}
            exportCSV>
                                   <TableHeaderColumn dataField='TxId' isKey={true}>TxId </TableHeaderColumn>
                                      <TableHeaderColumn dataField='AgentName' >Name</TableHeaderColumn></BootstrapTable>


#Correct Implementation:
<BootstrapTable
            data={products}
            options={options}
            pagination={true}
            exportCSV>
           <TableHeaderColumn dataField='TxId' isKey={true}>TxId </TableHeaderColumn>
           <TableHeaderColumn dataField='AgentName' >Name</TableHeaderColumn>
</BootstrapTable>