file(Path) or Name/Arity.
Location is a list of attributes of the location. 
Normally, this list will contain the term file(File) and, 
if available, the term line(Line).
file(Path) or Name/Arity.
Location is a list of attributes of the location. 
Normally, this list will contain the term file(File) and, 
if available, the term line(Line).