code: func (session *Session) UseBool(columns ...string) *Session {
  	session.statement.UseBool(columns...)
  	return session
  }
docs: // UseBool automatically retrieve condition according struct, but
  // if struct has bool field, it will ignore them. So use UseBool
  // to tell system to do not ignore them.
  // If no parameters, it will use all the bool field of struct, or
  // it will use parameters's columns