in lib/eventstream_rpc_utils.ts [183:189]
function throwMissingPropertyError(propertyName?: string, type?: string) : void {
if (propertyName && type) {
throw eventstream_rpc.createRpcError(eventstream_rpc.RpcErrorType.ValidationError, `Missing required property '${propertyName}' of type '${type}'`);
} else {
throw eventstream_rpc.createRpcError(eventstream_rpc.RpcErrorType.ValidationError, `Missing required property`);
}
}