code: func (c *Client) VerifyChainLevel(checkLevel int32) (bool, error) {
  	return c.VerifyChainLevelAsync(checkLevel).Receive()
  }
docs: // VerifyChainLevel requests the server to verify the block chain database using
  // the passed check level and default number of blocks to verify.
  //
  // The check level controls how thorough the verification is with higher numbers
  // increasing the amount of checks done as consequently how long the
  // verification takes.
  //
  // See VerifyChain to use the default check level and VerifyChainBlocks to
  // override the number of blocks to verify.