if err != nil {
		t.Fatal(err)
	}
	slices.Sort(all)

	sawImport := map[string]map[string]bool{} // from package => to package => true
	policy := depsPolicy(t)

	for _, pkg := range all {
		imports, err := findImports(pkg)
		if err != nil {
			t.Error(err)
			continue
		}
		if sawImport[pkg] == nil {
			sawImport[pkg] = map[string]bool{}
		}
		var bad []string
		for _, imp := range imports {

	cgoDirectives        string // the #cgo directive lines in the comment on import "C"
	goBuildConstraint    string
	plusBuildConstraints []string
	imports              []rawImport
	embeds               []embed
	directives           []build.Directive
}

type rawImport struct {
	path     string
	position token.Position
}

type embed struct {
	pattern  string
	position token.Position
}

		goBuildConstraint  - string offset
		len(plusBuildConstraints) - uint32
		plusBuildConstraints - [n]uint32 (string offsets)
		len(imports) uint32
		for each rawImport:
			path - string offset
			position - file, offset, line, column - uint32
		len(embeds) uint32
		for each embed:
			pattern - string offset
			position - file, offset, line, column - uint32
		len(directives) uint32

	return pos + 4 + n*(4*5)
}

func (sf *sourceFile) imports() []rawImport {
	sf.onceReadImports.Do(func() {
		importsOffset := sf.importsOffset()
		r := sf.d.readAt(importsOffset)
		numImports := r.int()
		ret := make([]rawImport, numImports)
		for i := 0; i < numImports; i++ {
			ret[i] = rawImport{r.string(), r.tokpos()}
		}
		sf.savedImports = ret
	})
	return sf.savedImports
}