#NEWLINE# @ cached_property #NEWLINE# def latest_diff_timestamp( self ) : #NEWLINE# #INDENT# ts_list = [ self . latest_nonzero_refresh_timestamp for m in self . metrics ] #NEWLINE# if ( not ts_list ) : #NEWLINE# #INDENT# return None #NEWLINE# #UNINDENT# try : #NEWLINE# #INDENT# return sorted ( ts_list , reverse = True ) [ 0 ] #NEWLINE# #UNINDENT# except IndexError : #NEWLINE# #INDENT# return None