code: VersionExcludeData getVersionIgnoreData(int major, int minor, int micro) {
          VersionExcludeData result = registry.get(new VersionKey(major, minor, micro));
          if (result == null) {
              result = registry.get(new VersionKey(major, minor, null));
          }
          return result;
      }
docs: Gets the host-ignore data for a slave host running the given version.
  
  @param major the kernel management API major version
  @param minor the kernel management API minor version
  @param micro the kernel management API micro version
  
  @return the host-ignore data, or {@code null} if there is no matching registration