code: def to_epsg_string(code):
      return f"epsg:{code}"
  
imports: import cupy
  import geopandas
  import numpy
  import pytest
  from cupy.testing import assert_allclose
  from pyproj import Transformer
  from pyproj.enums import TransformDirection
  from shapely.geometry import Point
  import cuspatial
  from cuproj import Transformer
label_desc: Use image node_id 1 for calling a global function with example usage: to_epsg_string(code) and returns: str, code