--- /dev/null
+<?php
+
+namespace League\Container\ServiceProvider;
+
+interface SignatureServiceProviderInterface
+{
+ /**
+ * Set a custom signature for the service provider. This enables
+ * registering the same service provider multiple times.
+ *
+ * @param string $signature
+ * @return self
+ */
+ public function withSignature($signature);
+
+ /**
+ * The signature of the service provider uniquely identifies it, so
+ * that we can quickly determine if it has already been registered.
+ * Defaults to get_class($provider).
+ *
+ * @return string
+ */
+ public function getSignature();
+}