=== Example Extension ===
* Fetch data from mainwp
Filter "mainwp-getsites": Fetch child-sites data.
* Call function on child-plugin
Filter "mainwp_fetchurlauthed": call function get_all_posts on child-plugin
Others callable functions on child-plugin:
$callableFunctions = array(
'stats' => 'getSiteStats',
'upgrade' => 'upgradeWP',
'newpost' => 'newPost',
'deactivate' => 'deactivate',
'newuser' => 'newUser',
'newadminpassword' => 'newAdminPassword',
'installplugintheme' => 'installPluginTheme',
'upgradeplugintheme' => 'upgradePluginTheme',
'backup' => 'backup',
'backup_checkpid' => 'backup_checkpid',
'cloneinfo' => 'cloneinfo',
'security' => 'getSecurityStats',
'securityFix' => 'doSecurityFix',
'securityUnFix' => 'doSecurityUnFix',
'post_action' => 'post_action',
'get_all_posts' => 'get_all_posts',
'comment_action' => 'comment_action',
'comment_bulk_action' => 'comment_bulk_action',
'get_all_comments' => 'get_all_comments',
'get_all_themes' => 'get_all_themes',
'theme_action' => 'theme_action',
'get_all_plugins' => 'get_all_plugins',
'plugin_action' => 'plugin_action',
'get_all_pages' => 'get_all_pages',
'get_all_users' => 'get_all_users',
'user_action' => 'user_action',
'search_users' => 'search_users',
'get_terms' => 'get_terms',
'set_terms' => 'set_terms',
'insert_comment' => 'insert_comment',
'get_post_meta' => 'get_post_meta',
'get_total_ezine_post' => 'get_total_ezine_post',
'get_next_time_to_post' => 'get_next_time_to_post',
'cancel_scheduled_post' => 'cancel_scheduled_post',
'serverInformation' => 'serverInformation',
'maintenance_site' => 'maintenance_site',
'keyword_links_action' => 'keyword_links_action',
'branding_child_plugin' => 'branding_child_plugin',
'code_snippet' => 'code_snippet',
'uploader_action' => 'uploader_action',
'wordpress_seo' => 'wordpress_seo',
'client_report' => 'client_report',
'createBackupPoll' => 'backupPoll',
'page_speed' => 'page_speed',
'woo_com_status' => 'woo_com_status',
'heatmaps' => 'heatmaps',
'links_checker' => 'links_checker',
'wordfence' => 'wordfence',
'delete_backup' => 'delete_backup',
'update_values' => 'update_values',
'ithemes' => 'ithemes',
'updraftplus' => 'updraftplus',
'backup_wp' => 'backup_wp'
);