parameters: (cls, accessor)
docstring: Register an instance of an Accessor or subclass
docstring_summary: Register an instance of an Accessor or subclass
docstring_tokens: Register an instance of an Accessor or subclass
function: def register_accessor(cls, accessor):
          """Register an instance of an Accessor or subclass"""
          cls.__REGISTERED_ACCESSORS[accessor.get_object()] = accessor
function_tokens: def register_accessor ( cls , accessor ) : cls . __REGISTERED_ACCESSORS [ accessor . get_object ( ) ] = accessor