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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 _parse_xml(child, parser):
 """Parses the specified child XML tag and creates a Subroutine or Function object out of it."""

    name, modifiers, dtype, kind = _parse_common(child)

    #Handle the symbol modification according to the isense settings.
    name = _isense_builtin_symbol(name)

    if child.tag == "subroutine":
        parent = Subroutine(name, modifiers, None)
    elif child.tag == "function":
        parent = Function(name, modifiers, dtype, kind, None)

    if parent is not None:
        for kid in child:
            if kid.tag == "parameter":
                _parse_parameter(kid, parser, parent)
            elif kid.tag == "summary":
                _parse_summary(kid, parser, parent)
            elif kid.tag == "usage":
                _parse_usage(kid, parser, parent)

    return parent