docs: @CheckForNull
      public static Executor of(Executable executable) {
          Jenkins jenkins = Jenkins.getInstanceOrNull(); // TODO confirm safe to assume non-null and use getInstance()
          if (jenkins == null) {
              return null;
          }
          for (Computer computer : jenkins.getComputers()) {
              for (Executor executor : computer.getAllExecutors()) {
                  if (executor.getCurrentExecutable() == executable) {
                      return executor;
                  }
              }
          }
          return null;
      }