const crypto/tls.extensionSupportedVersions

5 uses

	crypto/tls (current package)
		common.go#L98: 	extensionSupportedVersions       uint16 = 43
		handshake_messages.go#L223: 				b.AddUint16(extensionSupportedVersions)
		handshake_messages.go#L507: 		case extensionSupportedVersions:
		handshake_messages.go#L676: 				b.AddUint16(extensionSupportedVersions)
		handshake_messages.go#L796: 		case extensionSupportedVersions: