src/Resolver/InterfaceResolver.php
public function resolve($className)
    {
        $trimmed = ltrim($className, '\\');

        if (!$this->canResolve($trimmed)) return $className;

        return $this->implementations[$trimmed];
    }
public function resolve($className)
    {
        $trimmed = ltrim($className, '\\');

        if (!$this->canResolve($trimmed)) return $className;

        return $this->implementations[$trimmed];
    }
Resolve a given class name.

If the resolved class does not exist return the original class.

@param string $className
@return string