fix code style
diff --git a/src/php/lib/Grpc/ClientStreamingCall.php b/src/php/lib/Grpc/ClientStreamingCall.php
index 20db809..c542f08 100644
--- a/src/php/lib/Grpc/ClientStreamingCall.php
+++ b/src/php/lib/Grpc/ClientStreamingCall.php
@@ -35,8 +35,8 @@
namespace Grpc;
/**
- * Represents an active call that sends a stream of messages and then gets a
- * single response.
+ * Represents an active call that sends a stream of messages and then gets
+ * a single response.
*/
class ClientStreamingCall extends AbstractCall
{
@@ -44,8 +44,9 @@
* Start the call.
*
* @param array $metadata Metadata to send with the call, if applicable
+ * (optional)
*/
- public function start($metadata = [])
+ public function start(array $metadata = [])
{
$this->call->startBatch([
OP_SEND_INITIAL_METADATA => $metadata,
@@ -57,8 +58,8 @@
* wait is called.
*
* @param ByteBuffer $data The data to write
- * @param array $options an array of options, possible keys:
- * 'flags' => a number
+ * @param array $options An array of options, possible keys:
+ * 'flags' => a number (optional)
*/
public function write($data, array $options = [])
{