declare namespace C_Spell {
  /**
   * unknown behaviour
   * @param spellId
   * @returns rarityBorderAtlas
   * @see https://wow.gamepedia.com/API_C_Spell.GetMawPowerBorderAtlasBySpellID
   * @since 9.0.2 (2020-11-17)
   */
  function GetMawPowerBorderAtlasBySpellID(spellId: number): WoWAPI.AtlasID;

  /**
   * Needs summary
   * @param spellId
   * @see https://wow.gamepedia.com/API_C_Spell.DoesSpellExist
   * @since 8.0.1 (2018-07-17)
   */
  function DoesSpellExist(spellId: number): boolean;

  /**
   * Needs summary
   * @param spellId
   * @see https://wow.gamepedia.com/API_C_Spell.IsSpellDataCached
   * @since 8.0.1 (2018-07-17)
   */
  function IsSpellDataCached(spellId: number): boolean;

  /**
   * Asynchronously downloads spell information to the game client, making the full details available for subsequent calls to GetSpellInfo(spellId).
   * @param spellId
   * @fires SPELL_DATA_LOAD_RESULT
   * @see https://wow.gamepedia.com/API_C_Spell.RequestLoadSpellData
   * @since 8.0.1 (2018-07-17)
   */
  function RequestLoadSpellData(spellId: number): boolean;
}