docs: public final void setWorking(final String working) {
          final String webappPath = this.servletContext.getRealPath("/");
          final String webappName;
          if (webappPath != null) {
              webappName = new File(webappPath).getName();
          } else {
              webappName = "default";  // left like that only in UTs
          }
          this.working = new File(working.replace("{WEBAPP}", webappName));
          createIfMissing(this.working, "working");
          LOGGER.debug("Working directory: {}", this.working);
      }