use https://github.com/nunocoracao/blowfish.git

themes/blowfish/assets/lib/mermaid/assignWithDepth.d.ts

@@ -0,0 +1,30 @@
+/**
+ * assignWithDepth Extends the functionality of {@link Object.assign} with the
+ *   ability to merge arbitrary-depth objects For each key in src with path `k` (recursively)
+ *   performs an Object.assign(dst[`k`], src[`k`]) with a slight change from the typical handling of
+ *   undefined for dst[`k`]: instead of raising an error, dst[`k`] is auto-initialized to `{}` and
+ *   effectively merged with src[`k`]<p> Additionally, dissimilar types will not clobber unless the
+ *   config.clobber parameter === true. Example:
+ *
+ * ```
+ * const config_0 = { foo: { bar: 'bar' }, bar: 'foo' };
+ * const config_1 = { foo: 'foo', bar: 'bar' };
+ * const result = assignWithDepth(config_0, config_1);
+ * console.log(result);
+ * //-> result: { foo: { bar: 'bar' }, bar: 'bar' }
+ * ```
+ *
+ *   Traditional Object.assign would have clobbered foo in config_0 with foo in config_1. If src is a
+ *   destructured array of objects and dst is not an array, assignWithDepth will apply each element
+ *   of src to dst in order.
+ * @param dst - The destination of the merge
+ * @param src - The source object(s) to merge into destination
+ * @param config -
+ * * depth: depth to traverse within src and dst for merging
+ * * clobber: should dissimilar types clobber
+ */
+declare const assignWithDepth: (dst: any, src: any, { depth, clobber }?: {
+    depth?: number | undefined;
+    clobber?: boolean | undefined;
+}) => any;
+export default assignWithDepth;