public function buildSelectionSet($fields)
    {
        $selections[] = new FieldNode([
            'name' => new NameNode(['value' => '__typename']),
        ]);
        $this->currentLeafFields++;

        foreach ($fields as $field) {
            if ($this->currentLeafFields >= $this->maxLeafFields) {
                break;
            }

            $type = $field->getType();

            if ($type instanceof WrappingType) {
                $type = $type->getWrappedType(true);
            }

            if ($type instanceof ObjectType || $type instanceof InterfaceType) {
                $selectionSet = $this->buildSelectionSet($type->getFields());
            } else {
                $selectionSet = null;
                $this->currentLeafFields++;
            }

            $selections[] = new FieldNode([
                'name' => new NameNode(['value' => $field->name]),
                'selectionSet' => $selectionSet,
            ]);
        }

        $selectionSet = new SelectionSetNode([
            'selections' => $selections,
        ]);

        return $selectionSet;
    }
public function buildSelectionSet($fields)
    {
        $selections[] = new FieldNode([
            'name' => new NameNode(['value' => '__typename']),
        ]);
        $this->currentLeafFields++;

        foreach ($fields as $field) {
            if ($this->currentLeafFields >= $this->maxLeafFields) {
                break;
            }

            $type = $field->getType();

            if ($type instanceof WrappingType) {
                $type = $type->getWrappedType(true);
            }

            if ($type instanceof ObjectType || $type instanceof InterfaceType) {
                $selectionSet = $this->buildSelectionSet($type->getFields());
            } else {
                $selectionSet = null;
                $this->currentLeafFields++;
            }

            $selections[] = new FieldNode([
                'name' => new NameNode(['value' => $field->name]),
                'selectionSet' => $selectionSet,
            ]);
        }

        $selectionSet = new SelectionSetNode([
            'selections' => $selections,
        ]);

        return $selectionSet;
    }
@param FieldDefinition[] $fields

@return SelectionSetNode