@AssertFalse(message = "must be strictly between 0 and 1, or use -1 for arithmetic mean")
	public boolean isInvalidAlpha() {
		return alpha != -1 && (alpha <= 0.0 || alpha >= 1.0);
	}
Captures options for the {@code rich-gauge} sink module.

@author Eric Bottard
spring-xd-analytics/src/main/java/org/springframework/xd/analytics/metrics/metadata/RichGaugeSinkOptionsMetadata.java