code: func NewPolicyChecker(channelPolicyManagerGetter policies.ChannelPolicyManagerGetter, localMSP msp.IdentityDeserializer, principalGetter mgmt.MSPPrincipalGetter) PolicyChecker {
  	return &policyChecker{channelPolicyManagerGetter, localMSP, principalGetter}
  }
docs: // NewPolicyChecker creates a new instance of PolicyChecker