function getDefaultPresetsDir() {
  // get script path
  let scriptPath = Context().scriptPath

  // get presets dir path
  let presetsDirPath = scriptPath.stringByAppendingPathComponent('/../../../Presets/')
  presetsDirPath = presetsDirPath.stringByStandardizingPath()

  return presetsDirPath
}
Returns the default path to the presets dir.

@returns {String}