@Nonnull
	public Map<String, Property<?>> getProperties() {
		if (properties == null)
			return Collections.emptyMap();
		// Disallow modification
		return Collections.unmodifiableMap(properties);
	}
@param properties
		Pre-defined property map.
recaf-core/src/main/java/software/coley/recaf/info/properties/BasicPropertyContainer.java