You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: executor_intf.rs
    path of file: ./repos/polkadot/node/core/pvf/common/src
    
    the code of the file until where you have to start completion: // Copyright (C) Parity Technologies (UK) Ltd.
// This file is part of Polkadot.

// Polkadot is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// Polkadot is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with Polkadot.  If not, see <http://www.gnu.org/licenses/>.

//! Interface to the Substrate Executor

use polkadot_primitives::{ExecutorParam, ExecutorParams};
use sc_executor_common::{
	error::WasmError,
	runtime_blob::RuntimeBlob,
	wasm_runtime::{HeapAllocStrategy, InvokeMethod, WasmModule as _},
};
u
    
pub fn params_to_wasmtime_semantics(par: &ExecutorParams) -> Result<Semantics, String> {
	let mut sem = DEFAULT_CONFIG.semantics.clone();
	let mut stack_limit = if let Some(stack_limit) = sem.deterministic_stack_limit.clone() {
		stack_limit
	} else {
		return Err("No default stack limit set".to_owned())
	};

	for p in par.iter() {
		match p {
			ExecutorParam::MaxMemoryPages(max_pages) =>
				sem.heap_alloc_strategy =
					HeapAllocStrategy::Dynamic { maximum_pages: Some(*max_pages) },
			ExecutorParam::StackLogicalMax(slm) => stack_limit.logical_max = *slm,
			ExecutorParam::StackNativeMax(snm) => stack_limit.native_stack_max = *snm,
			ExecutorParam::WasmExtBulkMemory => sem.wasm_bulk_memory = true,
			// TODO: Not implemented yet; <https://github.com/paritytech/polkadot/issues/6472>.
			ExecutorParam::PrecheckingMaxMemory(_) => (),
			ExecutorParam::PvfPrepTimeout(_, _) | ExecutorParam::PvfExecTimeout(_, _) => (), /* Not used here */
		}
	}
	sem.deterministic_stack_limit = Some(stack_limit);
	Ok(sem)
}