Comparing source compatibility of  against 
===  UNCHANGED INTERFACE: PUBLIC ABSTRACT io.opentelemetry.api.common.Attributes  (not serializable)
	===  CLASS FILE FORMAT VERSION: 52.0 <- 52.0
	===  UNCHANGED METHOD: PUBLIC ABSTRACT java.lang.Object get(io.opentelemetry.api.common.AttributeKey)
		+++  NEW ANNOTATION: javax.annotation.Nullable