Function protobuf::rt::read_map_into

pub fn read_map_into<K, V>(
    wire_type: WireType, 
    is: &mut CodedInputStream, 
    target: &mut HashMap<K::Value, V::Value>
) -> ProtobufResult<()> where
    K: ProtobufType,
    V: ProtobufType,
    K::Value: Eq + Hash + Default,
    V::Value: Default, 

Read map field.