A good CS student spends some time up front reading all the source code of the libraries they're using, and some code that uses the libraries, to know what they

A good CS student spends some time up front reading all the source code of the libraries they're using, and some code that uses the libraries, to know what they're really doing, what they're capable of, and to learn from them. And by CS student, I include life-long students, and self-taught students.