| Class | Description | 
|---|---|
| ColumnData | 
 A data holder for a column data and metadata, used for both read and write operations. 
 | 
| ColumnFamilyRow | 
 A data holder for holding the row columns and the matching column family metadata. 
 | 
| Enum | Description | 
|---|---|
| ColumnFamilyRow.ColumnFamilyRowType | 
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