checkChannelNames_() {
    const outerName = this.channel_.name;
    /**
     * @suppress {missingProperties} suppression added to enable type checking
     */
    const innerName = this.getInnerPeer_().channel.name;
    const configName = this.innerFrameCfg_[CfgFields.CHANNEL_NAME] || null;

    // The outer channel never changes its name.
    assertEquals(this.initialOuterChannelName_, outerName);
    // The name should be as configured, if it was configured.
    if (configName) {
      assertEquals(configName, innerName);
    }
    // The names of both ends of the channel should match.
    assertEquals(innerName, outerName);
    G_testRunner.log('Channel name: ' + innerName);
  }
Checks the names of the inner and outer frames meet expectations.
@private
@suppress {undefinedVars} suppression added to enable type checking