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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _load_webgl_backend(ipython):
 """ Load the webgl backend for the IPython notebook"""


    from .. import app
    app_instance = app.use_app("ipynb_webgl")

    if app_instance.backend_name == "ipynb_webgl":
        ipython.write("Vispy IPython module has loaded successfully")
    else:
        # TODO: Improve this error message
        ipython.write_err("Unable to load webgl backend of Vispy")