const go/ast.Pkg

4 uses

	go/ast (current package)
		resolve.go#L147: 				obj := NewObj(Pkg, name)
		scope.go#L153: 	Pkg                // package
		scope.go#L163: 	Pkg: "package",

	go/doc
		doc.go#L265: 		pkg = ast.NewObj(ast.Pkg, path[strings.LastIndex(path, "/")+1:])

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