{"ast_node_type":"variable","tokens":[{"end":99,"kind":"keyword","start":0,"text":"let"}]}
                let a = builder.context.new_rvalue_from_vector(None, arg1_type, &[new_args[0]; 4]);
                let arg3_type = gcc_func.get_param_type(2);
                let b = builder.context.new_rvalue_from_vector(None, arg2_type, &[new_args[1]; 4]);