- block_admin_configure in core/
modules/ block/ block.admin.inc  - Form constructor for the block configuration form.
 - block_admin_list in core/
modules/ block/ block.admin.inc  - Page callback; Display a list of all custom blocks.
 - block_block_configure in core/
modules/ block/ block.module  - Implements hook_block_configure().
 - block_block_view in core/
modules/ block/ block.module  - Implements hook_block_view().
 - block_custom_block_delete in core/
modules/ block/ block.admin.inc  - Form constructor for the custom block deletion form.
 - block_custom_block_save in core/
modules/ block/ block.module  - Saves a user-created block in a config file.
 - block_custom_block_translate_access in core/
modules/ block/ block.admin.inc  - Menu access callback for translating a single block.
 - block_custom_block_translate_list in core/
modules/ block/ block.admin.inc  - Form constructor for the block translation list form.
 - _block_custom_block_name_exists in core/
modules/ block/ block.module  - Render API callback: Checks if a custom block machine name is taken.