src/Type/Definition/QueryPlan.php
private function analyzeSelectionSet(SelectionSetNode $selectionSet, ObjectType $parentType) : array
    {
        $fields = [];
        foreach ($selectionSet->selections as $selectionNode) {
            if ($selectionNode instanceof FieldNode) {
                $fieldName     = $selectionNode->name->value;
                $type          = $parentType->getField($fieldName);
                $selectionType = $type->getType();

                $subfields = [];
                if ($selectionNode->selectionSet) {
                    $subfields = $this->analyzeSubFields($selectionType, $selectionNode->selectionSet);
                }

                $fields[$fieldName] = [
                    'type' => $selectionType,
                    'fields' => $subfields ?? [],
                    'args' => Values::getArgumentValues($type, $selectionNode, $this->variableValues),
                ];
            } elseif ($selectionNode instanceof FragmentSpreadNode) {
                $spreadName = $selectionNode->name->value;
                if (isset($this->fragments[$spreadName])) {
                    $fragment  = $this->fragments[$spreadName];
                    $type      = $this->schema->getType($fragment->typeCondition->name->value);
                    $subfields = $this->analyzeSubFields($type, $fragment->selectionSet);

                    $fields = $this->arrayMergeDeep(
                        $subfields,
                        $fields
                    );
                }
            } elseif ($selectionNode instanceof InlineFragmentNode) {
                $type      = $this->schema->getType($selectionNode->typeCondition->name->value);
                $subfields = $this->analyzeSubFields($type, $selectionNode->selectionSet);

                $fields = $this->arrayMergeDeep(
                    $subfields,
                    $fields
                );
            }
        }

        return $fields;
    }
private function analyzeSelectionSet(SelectionSetNode $selectionSet, ObjectType $parentType) : array
    {
        $fields = [];
        foreach ($selectionSet->selections as $selectionNode) {
            if ($selectionNode instanceof FieldNode) {
                $fieldName     = $selectionNode->name->value;
                $type          = $parentType->getField($fieldName);
                $selectionType = $type->getType();

                $subfields = [];
                if ($selectionNode->selectionSet) {
                    $subfields = $this->analyzeSubFields($selectionType, $selectionNode->selectionSet);
                }

                $fields[$fieldName] = [
                    'type' => $selectionType,
                    'fields' => $subfields ?? [],
                    'args' => Values::getArgumentValues($type, $selectionNode, $this->variableValues),
                ];
            } elseif ($selectionNode instanceof FragmentSpreadNode) {
                $spreadName = $selectionNode->name->value;
                if (isset($this->fragments[$spreadName])) {
                    $fragment  = $this->fragments[$spreadName];
                    $type      = $this->schema->getType($fragment->typeCondition->name->value);
                    $subfields = $this->analyzeSubFields($type, $fragment->selectionSet);

                    $fields = $this->arrayMergeDeep(
                        $subfields,
                        $fields
                    );
                }
            } elseif ($selectionNode instanceof InlineFragmentNode) {
                $type      = $this->schema->getType($selectionNode->typeCondition->name->value);
                $subfields = $this->analyzeSubFields($type, $selectionNode->selectionSet);

                $fields = $this->arrayMergeDeep(
                    $subfields,
                    $fields
                );
            }
        }

        return $fields;
    }
@return mixed[]

@throws Error