src/Type/SchemaValidationContext.php
private function getEnumValueNodes(EnumType $enum, $valueName)
    {
        if ($enum->astNode && $enum->astNode->values) {
            return array_filter(
                iterator_to_array($enum->astNode->values),
                static function (EnumValueDefinitionNode $value) use ($valueName) {
                    return $value->name->value === $valueName;
                }
            );
        }

        return $enum->astNode ?
            $enum->astNode->values : null;
    }
private function getEnumValueNodes(EnumType $enum, $valueName)
    {
        if ($enum->astNode && $enum->astNode->values) {
            return array_filter(
                iterator_to_array($enum->astNode->values),
                static function (EnumValueDefinitionNode $value) use ($valueName) {
                    return $value->name->value === $valueName;
                }
            );
        }

        return $enum->astNode ?
            $enum->astNode->values : null;
    }
@param string $valueName

@return EnumValueDefinitionNode[]