SetLocationAndValue
void SetLocationAndValue(ValueLocation* location,
child->Node()->SetLocationAndValue(NULL, explicitValue, B_OK);
valueNode->SetLocationAndValue(NULL, NULL, error);
node->SetLocationAndValue(NULL, NULL, error);
fValueNode->SetLocationAndValue(location, value, B_OK);
parentNode->SetLocationAndValue(NULL, NULL, error);
fValueNode->SetLocationAndValue(NULL, NULL, error);
fValueNode->SetLocationAndValue(fValueNode->Location(), fNewValue, B_OK);
SetLocationAndValue(NULL, NULL, VALUE_NODE_UNRESOLVED);