There are now two methods to get the name of an object
 - display_name() returns the name of the object in its own local context
 - relative_display_name() returns the name of the object in the given
   context. If the object is local to the given pipeline, this is the same
   as display_name()

relative_display_name() is implemented in Cacheable. display_name() has a
default implementation in Cacheable too, but is often overloaded in the
sub-classes