+const static char* WDG_DOUBLEVALUE = "doublevalue";
+const static char* WDG_INTEGERVALUE = "integervalue";
+const static char* WDG_BOOLVALUE = "boolvalue";
+const static char* WDG_STRINGVALUE = "stringvalue";
+const static char* WDG_MULTISELECTOR = "multi_selector";
+const static char* WDG_SHAPE_SELECTOR = "shape_selector";
+const static char* WDG_CHOICE = "choice";
+const static char* WDG_DOUBLEVALUE_EDITOR = "doublevalue_editor";
+const static char* WDG_FILE_SELECTOR= "file_selector";
+const static char* WDG_EXPR_EDITOR = "expr_editor";
+// Containers