src/Zend/Filter/Inflector.php
public function setStaticRuleReference($name, &$reference)
    {
        $name = $this->_normalizeSpec($name);
        $this->_rules[$name] =& $reference;
        return $this;
    }
public function setStaticRuleReference($name, &$reference)
    {
        $name = $this->_normalizeSpec($name);
        $this->_rules[$name] =& $reference;
        return $this;
    }
Set Static Rule Reference.

This allows a consuming class to pass a property or variable
in to be referenced when its time to build the output string from the
target.

@param string $name
@param mixed $reference
@return Zend_Filter_Inflector