- 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.
