Row key / column key / value triplet corresponding to a mapping in a table.
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A collection that associates an ordered pair of keys, called a row key and a column key, with a single value. A table may be sparse, with only a small fraction of row key / column key pairs possessing a corresponding value. The mappings corresponding to a given row key may be viewed as a Map whose keys are the columns. The reverse is also available, associating a column with a row key / value map. Note that, in some implementations, data access by column key may have fewer supported operations or worse performance than data access by row key. The methods returning collections or maps always return views of the underlying table. Updating the table can change the contents of those collections, and updating the collections will change the table. All methods that modify the table are optional, and the views returned by the table may or may not be modifiable. When modification isn't supported, those methods will throw an UnsupportedOperationException. See the Guava User Guide article on Table.
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Returns a set of row keys that have one or more values in the table. Changes to the set will update the underlying table, and vice versa.
Returns the row key of this cell.
Returns a view of all mappings that have the given column key. For each row key / column key / value mapping in the table with that column key, the returned map associates the row key with the value. If no mappings in the table have the provided column key, an empty map is returned. Changes to the returned map will update the underlying table, and vice versa.
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Returns true if the table contains no mappings.
Returns a collection of all values, which may contain duplicates. Changes to the returned collection will update the underlying table, and vice versa.