+<?php
+
+namespace Drupal\libraries\ExternalLibrary\PhpFile;
+
+/**
+ * Provides an interface for PHP file loaders.
+ *
+ * @see \Drupal\libraries\ExternalLibrary\PhpFile\PhpFileLibraryInterface
+ */
+interface PhpFileLoaderInterface {
+
+ /**
+ * Loads a PHP file.
+ *
+ * @param string $file
+ * The absolute file path to the PHP file.
+ */
+ public function load($file);
+
+}