Super Mario player movement Script help && newish to c#

Question

i am getting the error PlayerMovement.ApplyGravity()' must declare a body because it is not marked abstract, extern, or partial [Assembly-CSharp]csharp(CS0501) I am currently working on a Super Mario lvl 1-1 unity project and am following along a tutorial for it. When i got to the, "ApplyGravity()," code block suddenly none of the code gets referenced and it comes back full of errors. How can I fix it?

 using UnityEngine;  
  
public class PlayerMovement : MonoBehaviour  
{  
    private new Camera camera;  
    private new Rigidbody2D rigidbody;  
    private float inputAxis;  
    private Vector2 velocity;  
      
    public float moveSpeed = 8.0f;  
    public float maxJumpHeight = 5.0f;  
    public float maxJumpTime = 1.0f;  
  
    public float jumpForce => (2.0f * maxJumpHeight) / (maxJumpTime / 2);  
    public float gravity => (-2.0f * maxJumpHeight) / Mathf.Pow((maxJumpTime / 2.0f), 2);  
  
    public bool grounded{ get; private set; }  
    public bool jumping { get; private set; }  
  
    private void Awake()   
    {  
        rigidbody = GetComponent<Rigidbody2D>();   
        camera = Camera.main;    
    }  
  
    private void Update()   
    {  
          
        HorizontalMovement();  
  
        grounded = rigidbody.Raycast(Vector2.down);  
  
        if(grounded)  
        {  
            GroundedMovement();  
        }  
  
        ApplyGravity();  
    }  
  
    private void HorizontalMovement()  
    {  
        inputAxis = Input.GetAxis("Horizontal");  
        velocity.x = Mathf.MoveTowards(velocity.x, inputAxis * moveSpeed, moveSpeed * Time.deltaTime);  
    }  
      
  
    private void FixedUpdate()   
    {  
        Vector2 position = rigidbody.position;  
        position += velocity * Time.deltaTime;  
  
        Vector2 leftEdge = camera.ScreenToWorldPoint(Vector2.zero);  
        Vector2 rightEdge = camera.ScreenToWorldPoint(new Vector2(Screen.width, Screen.height));  
        position.x = Mathf.Clamp(position.x, leftEdge.x - 4.5f, rightEdge.x + 0.5f);  
  
        rigidbody.MovePosition(position);     
    }  
      
  
    void GroundedMovement()  
    {  
        velocity.y = Mathf.Max(velocity.y, 0f);  
        jumping = velocity.y > 0f;  
  
        if (Input.GetButtonDown("Jump"))  
        {  
            velocity.y = jumpForce;  
            jumping = true;  
        }  
    }  
  
    void ApplyGravity();  
    {  
        bool falling = velocity.y < 0f || !Input.GetButton("Jump");  
        float multiplier = falling ? 2.0f : 1.0f;  
        velocity.y += gravity * multiplier * Time.deltaTime;  
        velocity.y = Mathf.Max(velocity.y, gravity / 2.0f);  
    }  
}