code: def geo_max_distance(left, right):
      
      op = ops.GeoMaxDistance(left, right)
      return op.to_expr()
docs: Returns the 2-dimensional maximum distance between two geometries in
      projected units. If g1 and g2 is the same geometry the function will
      return the distance between the two vertices most far from each other
      in that geometry
  
      Parameters
      ----------
      left : geometry
      right : geometry
  
      Returns
      -------
      MaxDistance : double scalar