const google.golang.org/protobuf/reflect/protoreflect.Required

9 uses

	google.golang.org/protobuf/reflect/protoreflect (current package)
		proto.go#L196: 	Required Cardinality = 2 // appears exactly one time; invalid with Proto3
		proto.go#L203: 	case Optional, Required, Repeated:
		proto.go#L215: 	case Required:
		proto.go#L229: 	case Required:

	google.golang.org/protobuf/internal/encoding/tag
		tag.go#L49: 			f.L1.Cardinality = pref.Required
		tag.go#L165: 	case pref.Required:

	google.golang.org/protobuf/internal/filedesc
		desc_lazy.go#L329: 			if fd.L1.Cardinality == pref.Required {

	google.golang.org/protobuf/internal/impl
		codec_message.go#L96: 			isRequired: fd.Cardinality() == pref.Required,
		validate.go#L132: 	if fd.Cardinality() == pref.Required {

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