code: def contains_only_linestrings(gs: GeoSeries):
      """
      Returns true if `gs` contains only linestrings
      """
      return (
          gs._column._meta.input_types == Feature_Enum.LINESTRING.value
      ).all()
  
file_path: cuspatial/python/cuspatial/cuspatial/utils/column_utils.py
imports: from typing import TypeVar
  import numpy
  from cudf.api.types import is_datetime_dtype
  from cudf.core.column.column import column_empty
  from cuspatial.core._column.geometa import Feature_Enum
  from cuspatial.core.dtypes import linestring_dtype, multipoint_dtype, point_dtype, polygon_dtype
label_desc: Use image node_id 6 for calling a global function with example usage: contains_only_linestrings(gs) and returns: unknown