  { 
  "model": { 
   "type": "minecraft:condition", 
    "on_false": { 
 "type": "minecraft:model", 
  "model": "item/shield/shield_balzam" 
    }, 
  "on_true": { 
  "type": "minecraft:model", 
 "model": "item/shieldblock/shield_balzam_block" 
  }, 
   "property": "minecraft:using_item" 
  } 
} 
