code: public Map<String,Object> getStaticVariables() {
          if (this.staticVariables == null) {
              return Collections.emptyMap();
          }
          return Collections.unmodifiableMap(this.staticVariables);
      }
docs: <p>
  Return the static variables, which will be available at the context
  every time this view is processed.
  </p>
  <p>
  These static variables are added to the context before the view is
  processed, so that they can be referenced from the context like any
  other context variables, for example: {@code ${myStaticVar}}.
  </p>
  
  @return the map of static variables to be set into view's execution.