code: def create_unit_hemisphere(recursion_level=2):
      """Creates a unit sphere by subdividing a unit octahedron, returns half
      the sphere.
  
      Parameters
      ----------
      recursion_level : int
          Level of subdivision, recursion_level=1 will return an octahedron,
          anything bigger will return a more subdivided sphere. The sphere will
          have $(4^recursion_level+2)/2$ vertices.
  
      Returns
      -------
      HemiSphere :
          Half of a unit sphere.
  
      See Also
      --------
      create_unit_sphere, Sphere, HemiSphere
      """
      sphere = create_unit_sphere(recursion_level)
      return HemiSphere.from_sphere(sphere)
  
label_desc: Use image node_id 2 for calling a global function with example usage: create_unit_hemisphere(recursion_level) and returns: HemiSphere