Method contains

src/main/java/org/bukkit/inventory/Inventory.java:83–83

Check if the inventory contains any ItemStacks with the given materialId @param materialId The materialId to check for @return If any ItemStacks were found

(int materialId)

     * @return If any ItemStacks were found
     */
    public boolean contains(int materialId);

    /**
     * Check if the inventory contains any ItemStacks with the given material