Function get_supported_versions_handler 

async fn get_supported_versions_handler(
    __arg0: OptionallyAuthenticatedClientRequest<Request>,
) -> ArminiusResponse<Response>

Handler for GET /_matrix/client/versions (See https://spec.matrix.org/v1.18/client-server-api/#get_matrixclientversions).

Gets the versions of the specification supported by the server.