[gxml] Document: export search_root_element_property()

[Daniel Espinosa Ortiz <despinosa src gnome org>]

commit b8c5baec192028ecf0c029be6ec5f37dc7c019b7
Author: Daniel Espinosa <esodan gmail com>
Date:   Wed Jul 24 14:31:27 2019 -0500

    Document: export search_root_element_property()
    
    To search properties marked as root elements, using
    ::ROOT nick name.

 gxml/Document.vala | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)
---
diff --git a/gxml/Document.vala b/gxml/Document.vala
index 0cc57c7..c2da5f1 100644
--- a/gxml/Document.vala
+++ b/gxml/Document.vala
@@ -29,7 +29,9 @@ using GXml;
  * to translate text XML tree to an GObject based tree.
  *
  * If you define a property in a derived class with a nick's name '::ROOT' it
- * will be initialized and used as root node to parse documents.
+ * will be initialized and used as root node to parse documents, when you call
+ * {@link DomDocument.read_from_string}, {@link DomDocument.read_from_file} or
+ * the like.
  */
 public class GXml.Document : GXml.Node,
                               DomParentNode,
@@ -100,7 +102,7 @@ public class GXml.Document : GXml.Node,
     parser.read_file (file);
   }
 
-  private GXml.Element get_root_gom_element () {
+  public GXml.Element search_root_element_property () {
     GLib.Object obj = null;
     foreach (ParamSpec spec in this.get_class ().list_properties ()) {
       if ("::" in spec.get_nick ()) {
@@ -145,7 +147,7 @@ public class GXml.Document : GXml.Node,
   }
 
   public Parser get_xml_parser () {
-    var roote = get_root_gom_element ();
+    var roote = search_root_element_property ();
     Parser parser = null;
     if (roote != null) {
       parser = new XParser (roote);