type ResolveResult struct {
	Path       ast.Path
	IsExternal bool

	// If not empty, these should override the default values
	JSXFactory  []string // Default if empty: "React.createElement"
	JSXFragment []string // Default if empty: "React.Fragment"

	// If true, any ES6 imports to this file can be considered to have no side
	// effects. This means they should be removed if unused.
	IgnoreIfUnused bool

	// If true, the class field transform should use Object.defineProperty().
	StrictClassFields bool
}

type Resolver interface {
	Resolve(sourceDir string, importPath string) *ResolveResult
	ResolveAbs(absPath string) *ResolveResult
	Read(path string) (string, bool)
	PrettyPath(path string) string
}