extensions CHANGE use the validate callback of extension plugin
The validate callback was not used so far. It is now used for validating
data nodes by extension instances placed in the nodes themselves or in
their types (compiled types, so not matter where the extension came
from, the node's type itself or a used typedef's type).
diff --git a/src/plugins_exts.h b/src/plugins_exts.h
index 271d1ef..c6f4b5e 100644
--- a/src/plugins_exts.h
+++ b/src/plugins_exts.h
@@ -90,16 +90,11 @@
/**
* @brief Callback to decide if data instance is valid according to the schema.
*
- * The callback is used only for the extension instances placed in the following parent statements
- * (which is specified as ::lysc_ext_instance.parent_type):
- * - LYEXT_PAR_NODE - @p node is instance of the schema node where the extension instance was specified.
- * - LYEXT_PAR_TPDF - @p node is instance of the schema node with the value of the typedef's type where the extension instance was specified.
- * - LYEXT_PAR_TYPE - @p node is instance of the schema node with the value of the type where the extension instance was specified.
- * - LYEXT_PAR_TYPE_BIT - @p node is instance of the schema node with the value of the bit where the extension instance was specified.
- * - LYEXT_PAR_TYPE_ENUM - @p node is instance of the schema node with the value of the enum where the extension instance was specified.
+ * The callback is used only for the extension instances placed in the data nodes or type (the
+ * ::lysc_ext_instance.parent_stmt value must be ::LY_STMT_IS_DATA_NODE() values or ::LY_STMT_TYPE):
*
* @param[in] ext Extension instance to be checked.
- * @param[in] node Data node, where the extension data are supposed to be placed.
+ * @param[in] node Data node connected with the extension instance.
*
* @return LY_SUCCESS on data validation success.
* @return LY_EVALID in case the validation fails.