diff --git a/doc.go b/doc.go
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+/*
+Package opt has a number of sub-packages provides alternatives to Go's built-in types (bool, float64, int64, string, time.Time)
+that also let you express a "lack of a value"; for the Go programming language; these are similar to "option types" or "maybe types"
+in some other programming languages.
+*/
+package opt
+