__init__ constructor Leave feedback

def __init__(self):
    ...

from groupdocs.watermark import Watermarker
from groupdocs.watermark.watermarks import TextWatermark, Font, Color
from groupdocs.watermark.common import HorizontalAlignment, VerticalAlignment
from groupdocs.watermark.options.presentation import (
    PresentationLoadOptions,
    PresentationWatermarkSlideOptions,
)

with Watermarker("./presentation.pptx", PresentationLoadOptions()) as watermarker:
    watermark = TextWatermark("CONFIDENTIAL", Font("Arial", 19.0))
    watermark.foreground_color = Color.red
    watermark.horizontal_alignment = HorizontalAlignment.CENTER
    watermark.vertical_alignment = VerticalAlignment.CENTER

    options = PresentationWatermarkSlideOptions()
    options.slide_index = 0
    watermarker.add(watermark, options)
    watermarker.save("./output.pptx")