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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 getModule(self, moduleName):
 """ Retrieve a JavaScript module cache from the file path cache. @returns: Module cache for the named module. @rtype: L{CachedJSModule} """

        if moduleName not in self.moduleCache:
            modulePath = FilePath(
                athena.jsDeps.getModuleForName(moduleName)._cache.path)
            cachedModule = self.moduleCache[moduleName] = CachedJSModule(
                moduleName, modulePath)
        else:
            cachedModule = self.moduleCache[moduleName]
        return cachedModule