The Java `com.intellij.util.containers.ContainerUtil.filter` method is a utility method provided by the IntelliJ IDEA platform, specifically under the `util.containers` package. It is used for filtering elements from a container or collection based on a given predicate.
The `filter` method takes in a container, such as a list or set, and a predicate function as parameters. It then iterates over the elements of the container, applying the predicate to each element. Elements that satisfy the predicate are included in the returned collection, while those that do not are excluded.
This method provides a convenient and concise way to filter elements from a container without requiring explicit loops or temporary collections. It can be used to easily extract a subset of elements that meet certain criteria from a larger collection.
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