def DfirstB(To):
    return idaapi.get_first_dref_to(To)
Read from the transport. If no data is available, should return None.
dataset/ETHPy150Open EiNSTeiN-/idapython/python/idc.py/DfirstB--crossover with--dataset/ETHPy150Open agoragames/haigha/haigha/transports/event_transport.py/EventTransport.read