wp-includes/class-wp-customize-setting.php:823Retrieves the data to export to the client via JSON.
array public function json() { return array( 'value' => $this->js_value(), 'transport' => $this->transport, 'dirty' => $this->dirty, 'type' => $this->type, ); }Introduced in 4.6.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/class-wp-customize-setting.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.