code: def is_coordsys_maker(obj):
      """Test if `obj` has the CoordSysMaker API
  
      Parameters
      ----------
      obj : object
          Object to test
  
      Returns
      -------
      tf : bool
          True if `obj` has the coordinate system API
  
      Examples
      --------
      >>> is_coordsys_maker(CoordSysMaker('ikj'))
      True
      >>> is_coordsys_maker(CoordinateSystem('xyz'))
      False
      """
      if not hasattr(obj, "coord_names"):
          return False
      if not hasattr(obj, "name"):
          return False
      if not hasattr(obj, "coord_dtype"):
          return False
      # Distinguish from CoordinateSystem
      return callable(obj)
  
imports: import numpy
label_desc: Use image node_id 4 for calling a global function with example usage: is_coordsys_maker(obj) and returns: callable, False, False, False