src/game/java/net/minecraft/world/Clearable.java

package net.minecraft.world;

import javax.annotation.Nullable;

public interface Clearable {
    void clearContent();

    static void tryClear(@Nullable Object p_18909_) {
        if (p_18909_ instanceof Clearable) {
            ((Clearable)p_18909_).clearContent();
        }
    }
}