Function: Make sure that auto-draft posts get their post_date bumped or status changed to draft to prevent premature garbage-collection.

Function: Publishes a snapshot’s changes.

Function: Filters changeset post data upon insert to ensure post_name is intact.

Function: Expand a theme’s starter content configuration using core-provided data.

Function: Update the `custom_css` post for a given theme.

Function: Render the Custom CSS style element.

Function: Fetch the `custom_css` post for a given theme.

Function: Fetch the saved Custom CSS content for rendering.

Function: Retrieve the markup for a custom header.

Function: Print the markup for a custom header.

Function: Display header video URL.

Function: Retrieve header video settings.

Function: Check whether a custom header is set or not.

Function: Checks whether the custom header video is eligible to show on the current page.

Function: Check whether a header video is set or not.

Function: Retrieve header video URL for custom header.

Function: Adds CSS to hide header text for custom logo, based on Customizer setting.

Function: Create image tag markup for a custom header image.

Function: Display the image markup for a custom header image.

Function: Check whether a header image is set or not.

Function: Whether the site is being previewed in the Customizer.

Function: Retrieve any registered editor stylesheets

Function: Prints a script to check whether or not the Customizer is supported, and apply either the no-customize-support or customize-support class to the body.