code: func (ctx *ResourceTransformationCtx) ReplaceOutPathExtension(newExt string) {
  	dir, file := path.Split(ctx.InPath)
  	base, _ := helpers.PathAndExt(file)
  	ctx.OutPath = path.Join(dir, (base + newExt))
  }
docs: // ReplaceOutPathExtension transforming InPath to OutPath replacing the file
  // extension, e.g. ".scss"