code: public void setLanguageVersion(int version)
      {
          if (sealed) onSealedMutation();
          checkLanguageVersion(version);
          Object listeners = propertyListeners;
          if (listeners != null && version != this.version) {
              firePropertyChangeImpl(listeners, languageVersionProperty,
                                 Integer.valueOf(this.version),
                                 Integer.valueOf(version));
          }
          this.version = version;
      }
docs: Set the language version.
  
  <p>
  Setting the language version will affect functions and scripts compiled
  subsequently. See the overview documentation for version-specific
  behavior.
  
  @param version the version as specified by VERSION_1_0, VERSION_1_1, etc.