package com.paritytrading.philadelphia;

interface Clock {

    long currentTimeMillis();

}

@@ -38,26 +38,212 @@
 a;%0A%0A
-interface Clock %7B%0A
+/**%0A * A time source.%0A */%0Apublic interface Clock %7B%0A%0A    /**%0A     * Get the current time in milliseconds.%0A     *%0A     * @return the current time in milliseconds%0A     * @see System#currentTimeMillis%0A     */
 %0A   

Make Clock interface public and add javadoc