private String extendKey()

in api/src/main/java/com/spotify/metrics/core/MetricId.java [119:129]

• 9 lines of code
• 5 McCabe index (conditional complexity)

    private String extendKey(final String part) {
        if (part == null || part.isEmpty()) {
            return key;
        }

        if (key == null || key.isEmpty()) {
            return part;
        }

        return key + SEPARATOR + part;
    }