docs: public final Object evaluateString(Scriptable scope, String source,
                                         String sourceName, int lineno,
                                         Object securityDomain)
      {
          Script script = compileString(source, sourceName, lineno,
                                        securityDomain);
          if (script != null) {
              return script.exec(this, scope);
          }
          return null;
      }