def METHOD_NAME(viz_helper):
    '''
    Returns the line flux calculation by opening the Line Analysis Plugin
    Assumes the plugin hasn't been opened yet
    '''
    # Open the plugin and force the calculation
    viz_helper.app.state.drawer = True
    line_analysis_plugin = viz_helper.app.get_tray_item_from_name('specviz-line-analysis')
    line_analysis_plugin.keep_active = True
    # Retrieve Results
    for result in line_analysis_plugin.results:
        if result['function'] == 'Line Flux':
            return result