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Zen API
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Removes a key-value pair from the map, optionally returning the old key and/or value.
For object-based keys or values, the old objects are not automatically disposed. In this case, use the oldKey and/or oldValue parameters to receive the previous object(s) and then dispose them.
| map | Map object. |
| key | Pointer to key. |
| oldKey | Optionally receives key (can be kNULL). |
| oldValue | Optionally receives value (can be kNULL). |