docs: protected void workspaceAdded( String workspaceName ) {
          String workspaceKey = NodeKey.keyForWorkspaceName(workspaceName);
          if (systemWorkspaceKey.equals(workspaceKey)) {
              // No sequencers for the system workspace!
              return;
          }
          Collection<SequencingConfiguration> configs = new LinkedList<SequencingConfiguration>();
          // Go through the sequencers to see which apply to this workspace ...
          for (Sequencer sequencer : sequencersById.values()) {
              boolean updated = false;
              for (SequencerPathExpression expression : pathExpressionsBySequencerId.get(sequencer.getUniqueId())) {
                  if (expression.appliesToWorkspace(workspaceName)) {
                      updated = true;
                      configs.add(new SequencingConfiguration(expression, sequencer));
                  }
              }
              if (DEBUG && updated) {
                  LOGGER.debug("Updated sequencer '{0}' (id={1}) configuration due to new workspace '{2}' in repository '{3}'",
                               sequencer.getName(), sequencer.getUniqueId(), workspaceName, repository.name());
              }
          }
          if (configs.isEmpty()) return;
          // Otherwise, update the configs by workspace key ...
          try {
              configChangeLock.lock();
              // Make a copy of the existing map ...
              Map<String, Collection<SequencingConfiguration>> configByWorkspaceName = new HashMap<String, Collection<SequencingConfiguration>>(
                                                                                                                                                this.configByWorkspaceName);
              // Insert the new information ...
              configByWorkspaceName.put(workspaceName, configs);
              // Replace the exisiting map (which is used without a lock) ...
              this.configByWorkspaceName = configByWorkspaceName;
          } finally {
              configChangeLock.unlock();
          }
      }