MergingExtractorOptionsinterface

Templated key pairs that should merge. Each key is a {base} template matched against the secondary element's key;
each value is an ordered list of {base} templates for the primary candidates to merge into.
- The first primary candidate that exists in the same directory wins; remaining candidates are ignored.
- If no candidate exists the secondary is left in place as its own tree element.
- Defaults to { "{base}.md": ["{base}.ts", "{base}.tsx", "{base}.js", "{base}.jsx"] }. readonly