KeywordThemeInfo

{

  // Union field keyword_theme can be only one of the following:
  "keywordThemeConstant": string,
  "freeFormKeywordTheme": string
  // End of list of possible types for union field keyword_theme.
}

string

The resource name of a Smart Campaign keyword theme constant. keywordThemeConstants/{keyword_theme_id}~{sub_keyword_theme_id}

string

Free-form text to be matched to a Smart Campaign keyword theme constant on a best-effort basis.