def setEventListener(element, listener):
    JS("""
    @{{element}}['__listener'] = @{{listener}};
    """)
Given a plan, return the district file for the plan at the current version.
dataset/ETHPy150Open pyjs/pyjs/pyjswidgets/pyjamas/DOM.browser.py/setEventListener--crossover with--dataset/ETHPy150Open PublicMapping/DistrictBuilder/django/publicmapping/redistricting/tasks.py/DistrictFile.get_file