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| object<-storage_reference |
->save_in_file
to handle shared object resources (colours, fonts, etc.). If this method
is executed successfully, object->save_in_file
stores the classname of the the object and the returned object.
source_sink<-object loads the
classname, converts the classname to a type
object, loads the returned reference object and attempts type<-check
to produce an object of the requested type.
See colour<-storage_reference
for an example.