['!', ['=', 'company_id.name', ['&', ..., ...]]]
That is, a domain could be a valid operand. But this is not the case. A domain
-is really limited to a two-level nature, and can not takes a recursive form: a
+is really limited to a two-level nature, and can not take a recursive form: a
domain is not a valid second-level operand.
Unaccent - Accent-insensitive search