Github user StephanEwen commented on the issue:
https://github.com/apache/flink/pull/2680
I added a new way to define configuration options (see below). It is a much
more maintainable way of defining configuration options.
Would be great if we used that for all new options that we create, and
lazily migrate existing parameters to that pattern.
```java
ConfigOption<Double> threshold = ConfigOptions
.key("cpu.utilization.threshold")
.defaultValue(0.9).
.withDeprecatedKeys("cpu.threshold");
```
Here is a complete example:
https://github.com/apache/flink/blob/master/flink-core/src/main/java/org/apache/flink/configuration/HighAvailabilityOptions.java
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