The API miss documentation so I used the C# client as a starting point
See : https://github.com/EventStore/EventStore/blob/release-v3.9.0/src/EventStore.ClientAPI/Projections/ProjectionsClient.cs
This member is added by an implicit conversion from ProjectionsUrls to
any2stringadd[ProjectionsUrls] performed by method any2stringadd in scala.Predef.
The API miss documentation so I used the C# client as a starting point See : https://github.com/EventStore/EventStore/blob/release-v3.9.0/src/EventStore.ClientAPI/Projections/ProjectionsClient.cs