| Package | Description | 
|---|---|
| com.google.cloud.firestore | 
| Modifier and Type | Field and Description | 
|---|---|
| static Precondition | Precondition. NONEAn empty Precondition that adds no enforcements | 
| Modifier and Type | Method and Description | 
|---|---|
| static Precondition | Precondition. updatedAt(Timestamp updateTime)Creates a Precondition that enforces that the existing document was written at the specified
 time. | 
| Modifier and Type | Method and Description | 
|---|---|
| T | UpdateBuilder. delete(DocumentReference documentReference,
      Precondition precondition)Deletes the document referred to by this DocumentReference. | 
| com.google.api.core.ApiFuture<WriteResult> | DocumentReference. delete(Precondition options)Deletes the document referred to by this DocumentReference. | 
| T | UpdateBuilder. update(DocumentReference documentReference,
      Map<String,Object> fields,
      Precondition options)Updates fields in the document referred to by this DocumentReference. | 
| T | UpdateBuilder. update(DocumentReference documentReference,
      Precondition options,
      FieldPath fieldPath,
      Object value,
      Object... moreFieldsAndValues)Updates the fields in the document referred to by this DocumentReference. | 
| T | UpdateBuilder. update(DocumentReference documentReference,
      Precondition options,
      String field,
      Object value,
      Object... moreFieldsAndValues)Updates the fields in the document referred to by this DocumentReference. | 
| com.google.api.core.ApiFuture<WriteResult> | DocumentReference. update(Map<String,Object> fields,
      Precondition options)Updates fields in the document referred to by this DocumentReference. | 
| com.google.api.core.ApiFuture<WriteResult> | DocumentReference. update(Precondition options,
      FieldPath fieldPath,
      Object value,
      Object... moreFieldsAndValues)Updates the fields in the document referred to by this DocumentReference. | 
| com.google.api.core.ApiFuture<WriteResult> | DocumentReference. update(Precondition options,
      String field,
      Object value,
      Object... moreFieldsAndValues)Updates the fields in the document referred to by this DocumentReference. | 
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