PulseModelsErlang.Customtype erlang_value = known_erlang_value optionand known_erlang_value = | Atom of string option| IntLit of string option| List of erlang_value list| Tuple of erlang_value list| GenServer of {}val return_value_model : erlang_value -> PulseModelsImport.model_no_non_disjval exists_db_model : IR.Procname.t -> bool