Restore items on respawn if condition is met

[Gerlif]

Hey, so I'm trying to write a Skript that saves player inventories on death, but only if the player has a certain item in their inventory when dying.

How do I check if player drops contain a certain item? So far I've tried this, but its not working.

on death of player:
    if player has permission "admin.admin":
        set {deathdrops.%uuid of victim%::*} to drops
        if {deathdrops.%uuid of victim%::*} contains 1 bedrock:
            set {voidcrystalused.%uuid of player%} to true
            message "Inventory saved"
            clear drops

on respawn:
    if player has permission "admin.admin":
        if {voidcrystalused.%uuid of player%} is true:
            add {deathdrops.%uuid of player%::*} to player's inventory
            message "Inventory added"
            set {voidcrystalused.%uuid of player%} to false