code: public Icon getIcon() {
          if (severity == null) {
              return null;
          }
          try {
              IconSource iconSource = ValkyrieRepository.getInstance().getApplicationConfig().iconSource();
              return iconSource.getIcon("severity." + severity.getLabel());
          }
          catch (NoSuchImageResourceException e) {
              return null;
          }
      }
docs: Returns the icon associated with this instance's severity. The icon is
  expected to be retrieved using a key {@code severity.&lt;SEVERITY_LABEL&gt;}.
  
  @return The icon associated with this instance's severity, or null if the
  instance has no specified severity, or the icon could not be found.
  
  @see Severity#getLabel()
  @see IconSource#getIcon(String)