code: public MustacheEngineBuilder addGlobalData(String name, Object value) {
          checkArgumentsNotNull(name, value);
          checkNotBuilt();
          this.globalData.put(name, value);
          return this;
      }
docs: Adds a value (e.g. Lambda) that is available during execution of all
  templates.
  
  Global values have to be thread-safe.
  
  @param value
  @param name
  @return self