src/Container.php
public function get($id)
    {
        if (!$this->isAliasExists($id)) {
            throw new NotFoundException(
                sprintf("Identifier %s was not found in our service container stack.", $id)
            );
        }

        return $this->aliases[$id];
    }
public function get($id)
    {
        if (!$this->isAliasExists($id)) {
            throw new NotFoundException(
                sprintf("Identifier %s was not found in our service container stack.", $id)
            );
        }

        return $this->aliases[$id];
    }
Finds an entry of the container by its identifier and returns it.

@param string $id Identifier of the entry to look for.

@throws NotFoundExceptionInterface  No entry was found for **this** identifier.
@throws ContainerExceptionInterface Error while retrieving the entry.

@return mixed Entry.