code: public static StringBuilder get(String key, int initialSize) {
          return get(FacesContext.getCurrentInstance(), key, initialSize);
      }
docs: Get a shared {@link StringBuilder} instance.
  This is required as e.g. 100 e.g. {@link org.primefaces.expression.SearchExpressionFacade#resolveClientId} calls would create
  300 {@link StringBuilder} instances!
  
  @param key The key for the {@link FacesContext} attributes.
  @param initialSize The initial size for the {@link StringBuilder}.
  @return The shared {@link StringBuilder} instance