--- /dev/null
+/**
+ * @param {Object} object
+ * @return {string}
+ */
+function valueOf(object) {}
+
+/**
+ * @param {Object} object
+ * @return {string}
+ */
+function toString(object) {}
+
+/**
+ * @param {Object} object
+ * @return {string}
+ */
+function toSource(object) {}
+
+/**
+ * @param {Object} object
+ * @return {string}
+ */
+function constructor(object) {}
\ No newline at end of file