[tracker/wip/carlosg/doc-updates: 2/7] libtracker-sparql: Mark parameter as nullable

[Carlos Garnacho <carlosg src gnome org>]

commit e32b9e438f41cf82cc565fccd217e2174bfca223
Author: Carlos Garnacho <carlosg gnome org>
Date:   Mon Mar 14 01:18:03 2022 +0100

    libtracker-sparql: Mark parameter as nullable
    
    This is missing in introspection annotations.

 docs/reference/libtracker-sparql/examples.md | 8 ++++----
 src/libtracker-sparql/tracker-batch.c        | 2 +-
 2 files changed, 5 insertions(+), 5 deletions(-)
---
diff --git a/docs/reference/libtracker-sparql/examples.md b/docs/reference/libtracker-sparql/examples.md
index bf60aaee9..d544838e5 100644
--- a/docs/reference/libtracker-sparql/examples.md
+++ b/docs/reference/libtracker-sparql/examples.md
@@ -34,7 +34,7 @@ main loop is not blocked while these operations are executed.
 Once you end up with the query, remember to call [](tracker_sparql_cursor_close).
 The same applies to [](tracker_sparql_connection_close) when no longer needed.
 
-<div class="gi-lang-c">
+<div class="gi-lang-c gi-lang-python gi-lang-javascript">
 
 {{ examples/connection-example.c }}
 
@@ -60,7 +60,7 @@ main loop is not blocked while these operations are executed.
 Once you no longer need the connection, remember to call
 [](tracker_sparql_connection_close) on the [](TrackerSparqlConnection).
 
-<div class="gi-lang-c">
+<div class="gi-lang-c gi-lang-python gi-lang-javascript">
 
 {{ examples/private-store-example.c }}
 
@@ -77,7 +77,7 @@ concretely the creation of a D-Bus endpoint, that other applications
 may query e.g. through a connection created with
 [](tracker_sparql_connection_bus_new).
 
-<div class="gi-lang-c">
+<div class="gi-lang-c gi-lang-python gi-lang-javascript">
 
 {{ examples/endpoint-example.c }}
 
@@ -94,7 +94,7 @@ on changes of certain RDF classes (Those with the
 This example demonstrates the use of [](TrackerNotifier) to receive
 notifications on database updates.
 
-<div class="gi-lang-c">
+<div class="gi-lang-c gi-lang-python gi-lang-javascript">
 
 {{ examples/notifier-example.c }}
 
diff --git a/src/libtracker-sparql/tracker-batch.c b/src/libtracker-sparql/tracker-batch.c
index 883d822a7..29c236851 100644
--- a/src/libtracker-sparql/tracker-batch.c
+++ b/src/libtracker-sparql/tracker-batch.c
@@ -189,7 +189,7 @@ tracker_batch_add_sparql (TrackerBatch *batch,
 /**
  * tracker_batch_add_resource:
  * @batch: a #TrackerBatch
- * @graph: RDF graph to insert the resource to
+ * @graph: (nullable): RDF graph to insert the resource to
  * @resource: a #TrackerResource
  *
  * Adds the RDF represented by @resource to @batch.