"""Vendored BFCL official AST checker (from bfcl-eval, Apache-2.0).

Source: bfcl_eval/eval_checker/ast_eval/{ast_checker.py,type_convertor/}
      + bfcl_eval/constants/type_mappings.py
Only change: imports rerouted locally and the MODEL_CONFIG_MAPPING lookup
replaced by an explicit ``underscore_to_dot`` argument. Upstream license
and notice apply to the files in this directory.
"""