code: func (c *MockConfig) TLSCACertPool() fab.CertPool {
  	if c.errorCase {
  		return &mockfab.MockCertPool{Err: errors.New("just to test error scenario")}
  	} else if c.CustomTLSCACertPool != nil {
  		return c.CustomTLSCACertPool
  	}
  	return &mockfab.MockCertPool{CertPool: x509.NewCertPool()}
  }
docs: // TLSCACertPool ...