Values.FileSystemAlreadyExistsSourceReturned if the file system you are trying to create already exists, with the creation token you provided.
type nonrec t = {errorCode : ErrorCode.t option;message : ErrorMessage.t option;fileSystemId : FileSystemId.t option;}val make :
?errorCode:ErrorCode.t ->
?message:ErrorMessage.t ->
?fileSystemId:FileSystemId.t ->
unit ->
t