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Twenty Nineteen back compat functionality Prevents Twenty Nineteen from running on WordPress versions prior to 4.7, since this theme is not meant to be backward compatible beyond that and relies on many newer functions and markup changes introduced in 4.7.
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|Prevent switching to Twenty Nineteen on old versions of WordPress.|
Switches to the default theme.
|Adds a message for unsuccessful theme switch.|
Prints an update nag after an unsuccessful attempt to switch to
Twenty Nineteen on WordPress versions prior to 4.7.
|Prevents the Customizer from being loaded on WordPress versions prior to 4.7.|
|Prevents the Theme Preview from being loaded on WordPress versions prior to 4.7.|
|Generated: Tue May 19 15:51:04 2020||Cross-referenced by PHPXref 0.7.1|