Paper/paper-api/src/main/java/org/bukkit/UnsafeValues.java

package org.bukkit;

import java.util.List;

import org.bukkit.inventory.ItemStack;

/**
 * This interface provides value conversions that may be specific to a
 * runtime, or have arbitrary meaning (read: magic values).
 * <p>
 * Their existence and behavior is not guaranteed across future versions. They
 * may be poorly named, throw exceptions, have misleading parameters, or any
 * other bad programming practice.
 * <p>
 * This interface is unsupported and only for internal use.
 *
 * @deprecated Unsupported & internal use only
 */
@Deprecated
public interface UnsafeValues {

    Material getMaterialFromInternalName(String name);

    List<String> tabCompleteInternalMaterialName(String token, List<String> completions);

    ItemStack modifyItemStack(ItemStack stack, String arguments);
}