Source
File: wp-includes/class-wp-customize-widgets.php
public function customize_dynamic_partial_args( $partial_args, $partial_id ) {
if ( ! current_theme_supports( 'customize-selective-refresh-widgets' ) ) {
return $partial_args;
}
if ( preg_match( '/^widget\[(?P<widget_id>.+)\]$/', $partial_id, $matches ) ) {
if ( false === $partial_args ) {
$partial_args = array();
}
$partial_args = array_merge(
$partial_args,
array(
'type' => 'widget',
'render_callback' => array( $this, 'render_widget_partial' ),
'container_inclusive' => true,
'settings' => array( $this->get_setting_id( $matches['widget_id'] ) ),
'capability' => 'edit_theme_options',
)
);
}
return $partial_args;
}