AABB collision I coded although it's useless since FlxG.collide() exists

AABB.hx

package;

import flixel.FlxG;
import flixel.FlxObject;

class AABB extends FlxObject
{
	var collider:FlxObject;

	var isColliding:Bool;

	public static var aabbCount:Int;

	var collisionAction:Void->Dynamic;

	public function new(x:Float, y:Float, width:Float, height:Float, ?collider:FlxObject = null, collisionAction:Void->Dynamic = null)
	{
		super(x, y, width, height);
		this.collider = collider;
		this.collisionAction = collisionAction;

		if (collisionAction == null)
			collisionAction = function()
			{
				if (isColliding)
					FlxObject.separate(this, collider);
				return null;
			}

		FlxG.collide(this, collider);

		aabbCount++;
		if (aabbCount > 10)
			FlxG.log.warn('Do not use too many AABBs!\nThey may use too much computational power!\nCurrentAABB Amount: $aabbCount');
	}

	public override function update(elapsed:Float)
	{
		isColliding = collisionHandler();

		if (isColliding)
			collisionAction();

		super.update(elapsed);
	}

	function collisionHandler()
	{
		if (this.x < collider.x + collider.width
			&& this.x + this.width > collider.x
			&& this.y < collider.y + collider.height
			&& this.y + this.height > collider.y)
		{
			return true;
		}
		else
		{
			return false;
		}
	}
}