[Scripting Question] Change the healing method of the Grassy Terrain

Hello, Is it possible that the grassy terrain only heals the user of the "Grassy Surge" ability ?

I think the code that needs to be modified is this one : (In the script "Battle_Phase_EndOfRound") :

# Grassy Terrain (healing)
if @field.terrain==PBBattleTerrains::Grassy && b.affectedByTerrain? && b.canHeal?
PBDebug.log("[Lingering effect] Grassy Terrain heals #{b.pbThis(true)}")
b.pbRecoverHP(b.totalhp/16)
pbDisplay(_INTL("{1}'s HP was restored.",b.pbThis))
end

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It would be cool if someone could help me 😅
I'm using version 18.1 (Sorry for my bad english is not my native language)