StreamMetadata
constructor(schemaVersion: Int = SCHEMA_VERSION, origin: String = "device", manufacturer: String?, model: String?, modelVariant: String?, serialNumber: String?, firmwareVersion: String?, hardwareVersion: String?, samplingRate: Double?, reference: String?, ground: String?, hardwareFilters: Map<String, Map<String, String>>?, cap: CapMetadata, channels: List<ChannelMetadata>, locationSource: String?, testSignal: Boolean?, impedanceMode: Boolean?, notApplicable: List<String> = emptyList(), brainaccess: BrainAccessMetadata?, canDropSamples: Boolean?, precisionBits: Int?, versions: Map<String, String>?)