function that is not exported is documented

[tonyhallett]

Preliminary Checks

• This issue is not a duplicate. Before opening a new issue, please search existing issues: https://github.com/gatsbyjs/gatsby/issues
• This issue is not a question, feature request, RFC, or anything other than a bug report. Please post those things in GitHub Discussions: https://github.com/gatsbyjs/gatsby/discussions

Summary

There is documentaion on https://www.gatsbyjs.com/docs/reference/config-files/actions/#shadowCreatePagePath that is a const that is not exported - see

gatsby/packages/gatsby/src/redux/actions/public.js

Line 42 in eb7fb9a

const shadowCreatePagePath = _.memoize(

Relevant markdown page
https://github.com/gatsbyjs/gatsby/blob/master/docs/docs/reference/config-files/actions.md

Steps to Resolve this Issue

1. Remove the function from the documentation

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