apply_filters( 'cloudinary_sync_base', $signatures, $post, $sync ) → {array}
    Filter the sync base to allow other plugins to add requested sync components for the sync signature.
    Parameters:
| Name | Type | Description | 
|---|---|---|
$signatures | 
            
            array | The attachments required signatures. | 
$post | 
            
            WP_Post | The attachment post. | 
$sync | 
            
            Sync | The sync object instance. | 
- Source:
 
Returns:
- Type
 - array