spec

type Package interface {
	// Load populates a PackageYML version by reading in the contents from a specific filepath
	Load(path string, mode int) error
	// Convert turns a versioned PackageYML into the intermediate internal.PackageYML representation
	Convert() (*internal.PackageYML, error)
	// Modify a versioned PackageYML with the contents of an internal.PackageYML
	Modify(changes internal.PackageYML) error
	// File returns the underlying file record
	File() *os.File
	// Save writes any changes to this PackageSpec to the currently open file descriptor
	Save() error
	// Close close the file descriptor for this PackageSpec
	Close()
}