src/ContainerAbstract.php
public function getAlias(string $abstract): string
    {
        if (! isset($this->aliases[$abstract])) {
            return $abstract;
        }
        if ($this->aliases[$abstract] === $abstract) {
            throw new ContainerException("[{$abstract}] is aliased to itself.");
        }

        return $this->getAlias($this->aliases[$abstract]);
    }
public function getAlias(string $abstract): string
    {
        if (! isset($this->aliases[$abstract])) {
            return $abstract;
        }
        if ($this->aliases[$abstract] === $abstract) {
            throw new ContainerException("[{$abstract}] is aliased to itself.");
        }

        return $this->getAlias($this->aliases[$abstract]);
    }
Get the alias for an abstract if available.

@param string $abstract

@throws \LogicException

@return string