Wrap given values in a block of same type as self.

def make_block_same_class(self, values, placement=None, ndim=None,
                              dtype=None):
        """ Wrap given values in a block of same type as self. """
        if dtype is not None:
            # issue 19431 fastparquet is passing this
            warnings.warn("dtype argument is deprecated, will be removed "
                          "in a future release.", DeprecationWarning)
        if placement is None:
            placement = self.mgr_locs
        return make_block(values, placement=placement, ndim=ndim,
                          klass=self.__class__, dtype=dtype)