def []( *key )
            if Hash === @value
                v = @value.detect { |k,| k.transform == key.first }
                v[1] if v
            elsif Array === @value
                @value.[]( *key )
            end
        end
def []( *key )
            if Hash === @value
                v = @value.detect { |k,| k.transform == key.first }
                v[1] if v
            elsif Array === @value
                @value.[]( *key )
            end
        end
We want the node to act like as Hash
 if it is.