If the container has a notion of key-value mapping, ValueType defines the type of the value of the container. Typically, a map-style container mapping values of type K to values of type V defines KeyType to be K and ValueType to be V.
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If the container has a notion of key-value mapping, ValueType defines the type of the value of the container. Typically, a map-style container mapping values of type K to values of type V defines KeyType to be K and ValueType to be V.