def METHOD_NAME(image, kernel_size=(5, 5)):
    """Applies Gaussian blur to an image.
    # Arguments
        image: Numpy array of shape ''(H, W, 4)''.
        kernel_size: List of two ints e.g. ''(5, 5)''.
    # Returns
        Numpy array
    """
    return cv2.GaussianBlur(image, kernel_size, 0)