Method as_map

arrow-array/src/cast.rs:962–964

Downcast this to a [`MapArray`] panicking if not possible

(&self)

    /// Downcast this to a [`MapArray`] panicking if not possible
    fn as_map(&self) -> &MapArray {
        self.as_map_opt().expect("map array")
    }

    /// Downcast this to a [`DictionaryArray`] returning `None` if not possible
    fn as_dictionary_opt<K: ArrowDictionaryKeyType>(&self) -> Option<&DictionaryArray<K>>;