textmate snippets and tabs

Question

hello,

i'm using snippets in textmate a lot -- especially for adding API documentation to my sources.

you can define placeholders in a snippet and you can use TAB / SHIFT+TAB to jump between those placeholders.

my question is:

is it still somehow possible to insert a tab at the current cursor position inside a placeholder position without breaking snippets' TAB / SHIFT+TAB functionality?

thanks a lot!