Pinq\Analysis\TypeSystem::getFunction PHP Method

    public function getFunction($name)
    {
        $normalizedName = $this->normalizeFunctionName($name);
        if (!isset($this->functions[$normalizedName])) {
            $this->functions[$normalizedName] = $this->buildFunction($normalizedName);
        }
        return $this->functions[$normalizedName];
    }