private function getSubfieldMap(FieldNode $ast1, $type1, FieldNode $ast2, $type2, ValidationContext $context)
{
$selectionSet1 = $ast1->selectionSet;
$selectionSet2 = $ast2->selectionSet;
if ($selectionSet1 && $selectionSet2) {
$visitedFragmentNames = new \ArrayObject();
$subfieldMap = $this->collectFieldNodesAndDefs($context, Type::getNamedType($type1), $selectionSet1, $visitedFragmentNames);
$subfieldMap = $this->collectFieldNodesAndDefs($context, Type::getNamedType($type2), $selectionSet2, $visitedFragmentNames, $subfieldMap);
return $subfieldMap;
}
}