[gnome-builder] gobject: add snippets for async/finish in headers

[Christian Hergert <chergert src gnome org>]

commit be2ef4e63c05b9ea67cd707182b3caf7ac14efae
Author: Christian Hergert <chergert redhat com>
Date:   Tue Jun 12 17:43:14 2018 -0700

    gobject: add snippets for async/finish in headers

 data/snippets/gobject.snippets | 13 +++++++++++++
 1 file changed, 13 insertions(+)
---
diff --git a/data/snippets/gobject.snippets b/data/snippets/gobject.snippets
index 726ff9038..ff932f444 100644
--- a/data/snippets/gobject.snippets
+++ b/data/snippets/gobject.snippets
@@ -421,6 +421,7 @@ snippet gsignal
                              ${8:0});
 snippet async
 - scope c
+- desc Create the async function for an async/finish pair
        /**
         * ${$2|functify}_$1_async:
         * @self: an #$2
@@ -445,8 +446,15 @@ snippet async
 
                $0
        }
+- scope chdr
+- desc Create the header declaration for an async function
+       void ${$2|functify}_${1:do_something}_async (${2:$filename|stripsuffix|camelize} *self,
+            ${$2|space} ${$1|space}         GCancellable *cancellable,
+            ${$2|space} ${$1|space}         GAsyncReadyCallback callback,
+            ${$2|space} ${$1|space}         gpointer user_data);
 snippet finish
 - scope c
+- desc Create the finish function for an async/finish pair
        /**
         * ${$2|functify}_$1_finish:
         * @self: an #$2
@@ -465,6 +473,11 @@ snippet finish
 
                return g_task_propagate_${4:boolean} (G_TASK (result), error);
        }
+- scope chdr
+- desc Create the header declaration for a finish function
+       gboolean ${$2|functify}_${1:do_something}_finish (${2:$filename|stripsuffix|camelize} *self,
+                ${$2|space} ${$1|space}          GAsyncResult *result,
+                ${$2|space} ${$1|space}          GError **error);
 snippet Private
 - desc Define a local for the GObject's private data.
 - scope c, chdr