Comparing source compatibility of  against 
+++  NEW INTERFACE: PUBLIC(+) ABSTRACT(+) io.opentelemetry.api.metrics.BatchCallback  (not serializable)
	+++  CLASS FILE FORMAT VERSION: 52.0 <- n.a.
	+++  NEW INTERFACE: java.lang.AutoCloseable
	+++  NEW SUPERCLASS: java.lang.Object
	+++  NEW METHOD: PUBLIC(+) void close()
***! MODIFIED INTERFACE: PUBLIC ABSTRACT io.opentelemetry.api.metrics.DoubleCounterBuilder  (not serializable)
	===  CLASS FILE FORMAT VERSION: 52.0 <- 52.0
	+++! NEW METHOD: PUBLIC(+) io.opentelemetry.api.metrics.ObservableDoubleMeasurement buildObserver()
***! MODIFIED INTERFACE: PUBLIC ABSTRACT io.opentelemetry.api.metrics.DoubleGaugeBuilder  (not serializable)
	===  CLASS FILE FORMAT VERSION: 52.0 <- 52.0
	+++! NEW METHOD: PUBLIC(+) io.opentelemetry.api.metrics.ObservableDoubleMeasurement buildObserver()
***! MODIFIED INTERFACE: PUBLIC ABSTRACT io.opentelemetry.api.metrics.DoubleUpDownCounterBuilder  (not serializable)
	===  CLASS FILE FORMAT VERSION: 52.0 <- 52.0
	+++! NEW METHOD: PUBLIC(+) io.opentelemetry.api.metrics.ObservableDoubleMeasurement buildObserver()
***! MODIFIED INTERFACE: PUBLIC ABSTRACT io.opentelemetry.api.metrics.LongCounterBuilder  (not serializable)
	===  CLASS FILE FORMAT VERSION: 52.0 <- 52.0
	+++! NEW METHOD: PUBLIC(+) io.opentelemetry.api.metrics.ObservableLongMeasurement buildObserver()
***! MODIFIED INTERFACE: PUBLIC ABSTRACT io.opentelemetry.api.metrics.LongGaugeBuilder  (not serializable)
	===  CLASS FILE FORMAT VERSION: 52.0 <- 52.0
	+++! NEW METHOD: PUBLIC(+) io.opentelemetry.api.metrics.ObservableLongMeasurement buildObserver()
***! MODIFIED INTERFACE: PUBLIC ABSTRACT io.opentelemetry.api.metrics.LongUpDownCounterBuilder  (not serializable)
	===  CLASS FILE FORMAT VERSION: 52.0 <- 52.0
	+++! NEW METHOD: PUBLIC(+) io.opentelemetry.api.metrics.ObservableLongMeasurement buildObserver()
***! MODIFIED INTERFACE: PUBLIC ABSTRACT io.opentelemetry.api.metrics.Meter  (not serializable)
	===  CLASS FILE FORMAT VERSION: 52.0 <- 52.0
	+++! NEW METHOD: PUBLIC(+) io.opentelemetry.api.metrics.BatchCallback batchCallback(java.lang.Runnable, io.opentelemetry.api.metrics.ObservableMeasurement, io.opentelemetry.api.metrics.ObservableMeasurement[])
***  MODIFIED INTERFACE: PUBLIC ABSTRACT io.opentelemetry.api.metrics.ObservableDoubleMeasurement  (not serializable)
	===  CLASS FILE FORMAT VERSION: 52.0 <- 52.0
	+++  NEW INTERFACE: io.opentelemetry.api.metrics.ObservableMeasurement
***  MODIFIED INTERFACE: PUBLIC ABSTRACT io.opentelemetry.api.metrics.ObservableLongMeasurement  (not serializable)
	===  CLASS FILE FORMAT VERSION: 52.0 <- 52.0
	+++  NEW INTERFACE: io.opentelemetry.api.metrics.ObservableMeasurement
+++  NEW INTERFACE: PUBLIC(+) ABSTRACT(+) io.opentelemetry.api.metrics.ObservableMeasurement  (not serializable)
	+++  CLASS FILE FORMAT VERSION: 52.0 <- n.a.
	+++  NEW SUPERCLASS: java.lang.Object