public abstract Task<string> CreateOneAsync(
	IndexKeysDefinition<TDocument> keys,
	CreateIndexOptions options = null,
	CancellationToken cancellationToken = null
)

Public MustOverride Function CreateOneAsync ( 
	keys As IndexKeysDefinition(Of TDocument),
	Optional options As CreateIndexOptions = Nothing,
	Optional cancellationToken As CancellationToken = Nothing
) As Task(Of String)

abstract CreateOneAsync : 
        keys : IndexKeysDefinition<'TDocument> * 
        ?options : CreateIndexOptions * 
        ?cancellationToken : CancellationToken 
(* Defaults:
        let _options = defaultArg options null
        let _cancellationToken = defaultArg cancellationToken null
*)
-> Task<string>