API C TradeSkillUI.GetOptionalReagentBonusText

Needs summary.
 bonusText = C_TradeSkillUI.GetOptionalReagentBonusText(recipeSpellID, optionalReagentIndex, optionalReagents)
==Arguments==
:;recipeSpellID:
:;optionalReagentIndex:
:;optionalReagents:
==Returns==
:;bonusText:
==Patch changes==