code: def hstack(self, Xs):
      pl = check_library_installed("polars")
      return pl.concat(Xs, how="horizontal")
  
imports: import importlib
  from functools import wraps
  from typing import Protocol, runtime_checkable
  import numpy
  from scipy.sparse import issparse
  from .._config import get_config
  from ._available_if import available_if
label_desc: Use image node_id 4 for calling the PolarsAdapter obj's underlying member method code with example usage: obj.hstack(Xs) and returns: pl