6.2. ExtentImpl
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## 6.2. ExtentImpl

Often, it is necessary to retrieve all items in an extent for processing of some sort. The `Extent` interface provides a mechanism for retrieving an `Iterator` that can be used to traverse the entire extent, but it does not provide a method for retrieving a collection of all the items in the extent.

Kodo JDO's `Extent` implementation provides a method that can be used to access the data in an extent via the `List` interface. See the `com.solarmetric.kodo.runtime.ExtentImpl` Javadoc for details.

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