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A comment on How to Use Go Interfaces. Parent comment

Re:How to Use Go Interfaces by tptacek on Monday March 19, 2018 @10:15PM (#16625455)
context also returns context.Context (an interface), and sql returns driver.Value, an interface.
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Re:How to Use Go Interfaces by dsymonds on Monday March 19, 2018 @11:44PM (#16625879)
context.Context is an interface because it is known there are multiple implementers (several in the context package itself). The sql driver.Value is actually the other way around: the sql package is the consuming package (for the driver).
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