src/ZfcTwig/Twig/StackLoader.php
public function setDefaultSuffix($defaultSuffix)
    {
        $this->defaultSuffix = (string) $defaultSuffix;
        $this->defaultSuffix = ltrim($this->defaultSuffix, '.');
        return $this;
    }
public function setDefaultSuffix($defaultSuffix)
    {
        $this->defaultSuffix = (string) $defaultSuffix;
        $this->defaultSuffix = ltrim($this->defaultSuffix, '.');
        return $this;
    }
Set default file suffix

@param  string $defaultSuffix
@return StackLoader