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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 echo_via_pager(*args, **kwargs):
 """Display pager only if it does not fit in one terminal screen. NOTE: The feature is available only on ``less``-based pager. """

    try:
        restore = 'LESS' not in os.environ
        os.environ.setdefault('LESS', '-iXFR')
        click.echo_via_pager(*args, **kwargs)
    finally:
        if restore:
            os.environ.pop('LESS', None)