rule/rule.go
func ScanAST(pkg string, bzlFile *bzl.File) *File {
	return ScanASTBody(pkg, "", bzlFile)
}
func ScanAST(pkg string, bzlFile *bzl.File) *File {
	return ScanASTBody(pkg, "", bzlFile)
}
// ScanAST creates a File wrapped around the given syntax tree. This tree
// will be modified by editing methods.