Syntax in V6 for flow(add|edit|save)

[venkymylaram]

<Route
exact
menu={menu}
flow={flow}
path={${MANAGE_REPORTS_ROUTES_PR.LOAN_REPAYMENT_DETAIL_REPORT}/:flow(add|edit|save)}
element={}
/>

  i am using this syntax  .its throwing error like no matchiong route found,Suggest me how to write syntax for above in v6 if it is /:flow(add|edit|save)`} like this