def extractContents(self):
        res = self.m_document.createSpanElement()
        self.extractContents(res)
        return res
Builds JSON which will be passed as a body of POST request to Marathon
dataset/ETHPy150Open pyjs/pyjs/pyjswidgets/pyjamas/selection/Range.py/Range.extractContents--crossover with--dataset/ETHPy150Open GoogleCloudPlatform/PerfKitBenchmarker/perfkitbenchmarker/providers/mesos/mesos_docker_instance.py/MesosDockerInstance._BuildAppBody