plugin/src/main/java/io/fabric8/maven/plugin/mojo/develop/WatchMojo.java
private ProcessorConfig extractWatcherConfig() {
        try {
            return ProfileUtil.blendProfileWithConfiguration(ProfileUtil.WATCHER_CONFIG, profile, ResourceDirCreator.getFinalResourceDir(resourceDir, environment), watcher);
        } catch (IOException e) {
            throw new IllegalArgumentException("Cannot extract watcher config: " + e, e);
        }
    }
private ProcessorConfig extractWatcherConfig() {
        try {
            return ProfileUtil.blendProfileWithConfiguration(ProfileUtil.WATCHER_CONFIG, profile, ResourceDirCreator.getFinalResourceDir(resourceDir, environment), watcher);
        } catch (IOException e) {
            throw new IllegalArgumentException("Cannot extract watcher config: " + e, e);
        }
    }
Get watcher config