+static void stringitem_releasekey(void *this,void *key) {
+}
+
+/**
+ * This callback function writes a representation of an item into
+ * a character buffer.
+ */
+static int stringitem_tostring(void *this,void *item,char *buffer,int limit) {
+ if ( item ) {
+ return snprintf( buffer, limit, "\"%s\"", (char*) item );
+ }
+ return snprintf( buffer, limit, "(null)" );