code: def list_out():
      """A JSON extent on the unit square spanning (0, 0), (1, 1)."""
      return es.extent_to_json([0, 0, 1, 1])
  
file_path: earthpy/earthpy/tests/test_extent_to_json.py
imports: import pandas
  import pytest
  import geopandas
  from shapely.geometry import Polygon, Point
  import earthpy.spatial
label_desc: Use image node_id 1 for calling a global function with example usage: list_out() and returns: es