See: Description
| Class | Description | 
|---|---|
| MutationGroup | A bundle of mutations that must be submitted atomically. | 
| ReadOperation | Encapsulates a spanner read operation. | 
| SpannerAccessor | Manages lifecycle of  DatabaseClientandSpannerinstances. | 
| SpannerConfig | Configuration for a Cloud Spanner client. | 
| SpannerConfig.Builder | Builder for  SpannerConfig. | 
| SpannerIO | Experimental  Transformsfor reading from and writing to Google Cloud Spanner. | 
| SpannerIO.CreateTransaction | A  PTransformthat create a transaction. | 
| SpannerIO.CreateTransaction.Builder | A builder for  SpannerIO.CreateTransaction. | 
| SpannerIO.Read | Implementation of  SpannerIO.read(). | 
| SpannerIO.ReadAll | Implementation of  SpannerIO.readAll(). | 
| SpannerIO.Write | A  PTransformthat writesMutationobjects to Google Cloud Spanner. | 
| SpannerIO.WriteGrouped | Same as  SpannerIO.Writebut supports grouped mutations. | 
| SpannerWriteResult | A result of  SpannerIO.write()transform. | 
| Transaction | A transaction object. | 
| Enum | Description | 
|---|---|
| SpannerIO.FailureMode | A failure handling strategy. |