ExpandChangedDirectories expands every directory listed in the array to all its file.

GetChangedPackages get the go SDK packages map from the given changed file list.

IsValidPackage returns true when the given directory is a valid azure-sdk-for-go package, otherwise returns false (including the directory does not exist) The criteria of a valid azure-sdk-for-go package is that the directory must have a `client.go` and a `version.go` file.

NewOptionsFrom returns a new options from a io.Reader.

Options describes the options used in an autorest task.

Task describes a generation task.

TaskError the error returned during an autorest task.

ChangedPackagesMap is a wrapper of a map of packages.