Module->VERSION(1.23) works only for modules which install a VERSION() method.
That is not entirely true as LanX already explained. However, it assumes that the module provides in some standard way a version number that can be understood and compared. In that respect nothing is guaranteed.
CountZero
A program should be light and agile, its subroutines connected like a string of pearls. The spirit and intent of the program should be retained throughout. There should be neither too little or too much, neither needless loops nor useless variables, neither lack of structure nor overwhelming rigidity." - The Tao of Programming, 4.1 - Geoffrey James
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