eolian: add API to get children of a unit

src/lib/eolian/Eolian.h

@@ -559,6 +559,17 @@ EAPI const Eolian_Unit *eolian_state_unit_by_file_get(const Eolian_State *state,
  */
 EAPI Eina_Iterator *eolian_state_units_get(const Eolian_State *state);
 
+/*
+ * @brief Get the children (dependencies) of a unit.
+ *
+ * The iterator is obviously again to `const Eolian_Unit *`.
+ *
+ * @param[in] unit The unit.
+ *
+ * @ingroup Eolian
+ */
+EAPI Eina_Iterator *eolian_unit_children_get(const Eolian_Unit *unit);
+
 /*
  * @brief Parse the given .eo or .eot file and fill the database.
  *

src/lib/eolian/eolian_database.c

@@ -677,6 +677,13 @@ eolian_state_units_get(const Eolian_State *state)
    return eina_hash_iterator_data_new(state->units);
 }
 
+EAPI Eina_Iterator *
+eolian_unit_children_get(const Eolian_Unit *unit)
+{
+   if (!unit) return NULL;
+   return eina_hash_iterator_data_new(unit->children);
+}
+
 char *
 database_class_to_filename(const char *cname)
 {