mce_buttons_2
Filter Hook: Filters the second-row list of TinyMCE buttons (Visual tab).
Source: wp-includes/class-wp-editor.php:698
mce_buttons_3
Filter Hook: Filters the third-row list of TinyMCE buttons (Visual tab).
Source: wp-includes/class-wp-editor.php:710
_WP_Editors
Class: Facilitates adding of the WordPress editor as used on the Write and Edit screens.
Source: wp-includes/class-wp-editor.php:11
_WP_Editors::parse_settings()
Method: Parse default arguments for the editor instance.
Source: wp-includes/class-wp-editor.php:69
_WP_Editors::editor()
Method: Outputs the HTML for a single instance of the editor.
Source: wp-includes/class-wp-editor.php:156