<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def visit_If(self, node):
 """ OUT = true branch U false branch RAISES = true branch U false branch """

        currs = (node,)
        raises = ()

        # true branch
        for n in node.body:
            self.result.add_node(n)
            for curr in currs:
                self.result.add_edge(curr, n)
            currs, nraises = self.visit(n)
            raises += nraises
        if is_true_predicate(node.test):
            return currs, raises

        # false branch
        tcurrs = currs
        currs = (node,)
        for n in node.orelse:
            self.result.add_node(n)
            for curr in currs:
                self.result.add_edge(curr, n)
            currs, nraises = self.visit(n)
            raises += nraises
        return tcurrs + currs, raises