'Adds node to function manager, converting address to CodeNode if
possible
:param int addr: node address
:param int function_addr: address of function
:return: None'

def _function_add_node(self, addr, function_addr):

    try:
        node = self._to_snippet(self._nodes[addr])
    except KeyError:
        node = addr
    self.kb.functions._add_node(function_addr, node)
