Fixes from PHPStan level 0

src/ChangeStream.php

@@ -66,7 +66,7 @@ class ChangeStream implements Iterator
     }
 
     /**
-     * @return MongoDB\Driver\CursorId
+     * @return \MongoDB\Driver\CursorId
      */
     public function getCursorId()
     {
@@ -143,8 +143,8 @@ class ChangeStream implements Iterator
         if ($document === null) {
             throw new ResumeTokenException("Cannot extract a resumeToken from an empty document");
         }
-        if ($document instanceof Serializable) {
-            return $this->extractResumeToken($document->bsonSerialize());
+        if ($document instanceof \Serializable) {
+            $this->extractResumeToken($document->bsonSerialize());
         }
         if (isset($document->_id)) {
             $this->resumeToken = is_array($document) ? $document['_id'] : $document->_id;

src/GridFS/Bucket.php

@@ -17,6 +17,7 @@
 
 namespace MongoDB\GridFS;
 
+use MongoDB\Collection;
 use MongoDB\Driver\Cursor;
 use MongoDB\Driver\Manager;
 use MongoDB\Driver\ReadConcern;

src/GridFS/ReadableStream.php

@@ -175,7 +175,7 @@ class ReadableStream
     public function seek($offset)
     {
         if ($offset < 0 || $offset > $this->file->length) {
-            throw new InvalidArgumentException(sprintf('$offset must be >= 0 and <= %d; given: %d', $length, $offset));
+            throw new InvalidArgumentException(sprintf('$offset must be >= 0 and <= %d; given: %d', $this->file->length, $offset));
         }
 
         /* Compute the offsets for the chunk and buffer (i.e. chunk data) from

src/GridFS/StreamWrapper.php

@@ -41,7 +41,7 @@ class StreamWrapper
     /**
      * Return the stream's file document.
      *
-     * @return stdClass
+     * @return \stdClass
      */
     public function getFile()
     {

src/GridFS/WritableStream.php

@@ -141,7 +141,7 @@ class WritableStream
     /**
      * Return the stream's file document.
      *
-     * @return stdClass
+     * @return \stdClass
      */
     public function getFile()
     {

src/MapReduceResult.php

@@ -77,7 +77,7 @@ class MapReduceResult implements IteratorAggregate
      * Return the mapReduce results as a Traversable.
      *
      * @see http://php.net/iteratoraggregate.getiterator
-     * @return Traversable
+     * @return \Traversable
      */
     public function getIterator()
     {

src/Operation/BulkWrite.php

@@ -243,7 +243,7 @@ class BulkWrite implements Executable
                         $this->isArrayFiltersUsed = true;
 
                         if ( ! is_array($args[2]['arrayFilters'])) {
-                            throw InvalidArgumentException::InvalidType(sprintf('$operations[%d]["%s"][2]["arrayFilters"]', $i, $type), $args[2]['arrayFilters'], 'array');
+                            throw InvalidArgumentException::invalidType(sprintf('$operations[%d]["%s"][2]["arrayFilters"]', $i, $type), $args[2]['arrayFilters'], 'array');
                         }
                     }
 

src/Operation/ChangeStream.php

@@ -165,7 +165,7 @@ class ChangeStream implements Executable
     /**
      * Create the aggregate pipeline with the changeStream command.
      *
-     * @return Command
+     * @return \MongoDB\Driver\Command
      */
     private function createCommand()
     {