def swapPOM(dst, src=None):
    if src:
        return dst.replace(src)
    else:
        return dst.detach()
subscript : test COLON test COLON test
dataset/ETHPy150Open kdart/pycopia/XML/pycopia/XML/POM.py/swapPOM--crossover with--dataset/ETHPy150Open nucleic/enaml/enaml/core/parser.py/p_subscript13