code: @CheckReturnValue
      public final InviteAction setMaxAge(final Integer maxAge)
      {
          if (maxAge != null)
              Checks.notNegative(maxAge, "maxAge");
  
          this.maxAge = maxAge;
          return this;
      }
docs: Sets the max age in seconds for the invite. Set this to {@code 0} if the invite should never expire. Default is {@code 86400} (24 hours).
  {@code null} will reset this to the default value.
  
  @param  maxAge
  The max age for this invite or {@code null} to use the default value.
  
  @throws IllegalArgumentException
  If maxAge is negative.
  
  @return The current InviteAction for chaining.