When can you use Minecraft.getMinecraf();

I don't understand when you can use it or how you can, I made a "PlayerTickEvent" and I want to use "gameSettings" to see if the player pressed any keys to change the "event.player.abilities.setWalkSpeed". But I need to use .getMinecraft() to get the gameSettings. It says "The method getMinecraft() is undefined for the type Minecraft". 

 

package com.opl.mod.client.event;

import net.minecraft.client.Minecraft;
import net.minecraftforge.api.distmarker.Dist;
import net.minecraftforge.event.TickEvent;
import net.minecraftforge.eventbus.api.Event;
import net.minecraftforge.eventbus.api.SubscribeEvent;
import net.minecraftforge.fml.common.Mod.EventBusSubscriber;
import net.minecraftforge.fml.common.Mod.EventBusSubscriber.Bus;

@EventBusSubscriber(modid="oplmodid", bus = Bus.FORGE, value = Dist.CLIENT)
public class ClientEvents {
	
	private static final Minecraft mc = Minecraft.getMinecraft();
	
	@SubscribeEvent
	public static void onBlockBreak(final TickEvent.PlayerTickEvent event) {
		
		if (mc.gameSettings.keyBindAttack.isKeyDown()) {
			event.player.abilities.setWalkSpeed(3f);
		} else {
			event.player.abilities.setWalkSpeed(1f);
		}
	}
}