src/main/php/ioc/Injector.php
public function getConstant($name)
    {
        return $this->getBinding(ConstantBinding::TYPE, $name)
                    ->getInstance($this, $name);
    }
public function getConstant($name)
    {
        return $this->getBinding(ConstantBinding::TYPE, $name)
                    ->getInstance($this, $name);
    }
returns constanct value

@api
@param   string  $name  name of constant value to retrieve
@return  scalar
@since   1.1.0