[wp-trac] [WordPress Trac] #61112: Avoid re-constructing `WP_Theme_JSON` object from raw theme_json, instead use `WP_Theme_JSON` object inside `WP_Theme_JSON_data`

[WordPress Trac]

#61112: Avoid re-constructing `WP_Theme_JSON` object from raw theme_json, instead
use `WP_Theme_JSON` object inside `WP_Theme_JSON_data`
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 Reporter:  thekt12       |       Owner:  thekt12
     Type:  defect (bug)  |      Status:  reopened
 Priority:  normal        |   Milestone:  6.6
Component:  General       |     Version:
 Severity:  normal        |  Resolution:
 Keywords:  has-patch     |     Focuses:  performance
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Comment (by joemcgill):

 Thanks @ryelle. Given that we currently have cases where a plugin is using
 the filter to return a `WP_Theme_JSON_Data_Gutenberg` object that may not
 be fully compatible with changes in core, I think we should at least add
 the safety check for now.

 I'll open a new Gutenberg ticket to address the larger architectural
 concerns for the future.

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Ticket URL: <https://core.trac.wordpress.org/ticket/61112#comment:21>
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