public static String getMemoryLocation(final String location, final String memoryKey) {
        return location.endsWith("/") ? location + memoryKey : location + "/" + memoryKey;
    }
@param location not null, not empty UNIX-formatted file system path
@param memoryKey not null, not empty
@return not empty UNIX-formatted file system path to the memory in the location, still compatible with Windows and {@code File}
hadoop-gremlin/src/main/java/org/apache/tinkerpop/gremlin/hadoop/Constants.java