References: google.golang.org/protobuf/internal/genid.ExtensionRangeOptions_Features_field

const google.golang.org/protobuf/internal/genid.ExtensionRangeOptions_Features_field_number

one use

	google.golang.org/protobuf/internal/genid (current package)
		descriptor_gen.go#L222: 	ExtensionRangeOptions_Features_field_number            protoreflect.FieldNumber = 50

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