GetProcessById.
        [Preview API] Get a process by ID.
        :param str process_id: ID for a process.
        :rtype: :class:`<Process> <azure.devops.v5_1.core.models.Process>`

def get_process_by_id(self, process_id):
        """GetProcessById.
        [Preview API] Get a process by ID.
        :param str process_id: ID for a process.
        :rtype: :class:`<Process> <azure.devops.v5_1.core.models.Process>`
        """
        route_values = {}
        if process_id is not None:
            route_values['processId'] = self._serialize.url('process_id', process_id, 'str')
        response = self._send(http_method='GET',
                              location_id='93878975-88c5-4e6a-8abb-7ddd77a8a7d8',
                              version='5.1-preview.1',
                              route_values=route_values)
        return self._deserialize('Process', response)