Solved Blueprint system changed [Lua]

Hey, i can't get this script to work somehow. They changed the BP System and i took an example for the BlueprintManager.

Code:

function LearnBP(Player, BlueprintName)
    local ItemDefinition = global.ItemManager.FindItemDefinition(BlueprintName)
    if(ItemDefinition == nil) then return end
    Player.blueprints.Learn(ItemDefinition)

It's my code, but it ain't working cuz the function is overloaded twice. Is there a a solution around this? Cuz everytime i call the FindItemDefinition function i get an error (attempt to call field 'FindItemDefinition' (a table value)