go/types.PkgName.used (field)

5 uses

	go/types (current package)
		call.go#L450: 			pname.used = true
		object.go#L187: 	used     bool // set if the package was used
		resolver.go#L301: 					pkgName.used = true
		resolver.go#L686: 		if !obj.used && obj.name != "_" {
		typexpr.go#L73: 		pkgName.used = true