Refresh the parameters passed to the JavaScript via JSON.

Source

public function to_json() {
	$this->json['settings'] = array();
	foreach ( $this->settings as $key => $setting ) {
		$this->json['settings'][ $key ] = $setting->id;
	}

	$this->json['type']           = $this->type;
	$this->json['priority']       = $this->priority;
	$this->json['active']         = $this->active();
	$this->json['section']        = $this->section;
	$this->json['content']        = $this->get_content();
	$this->json['label']          = $this->label;
	$this->json['description']    = $this->description;
	$this->json['instanceNumber'] = $this->instance_number;

	if ( 'dropdown-pages' === $this->type ) {
		$this->json['allow_addition'] = $this->allow_addition;
	}
}

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