class_docstr: Reuses PrestoEngineSpec functionality.
class_docstr_tok: ["Reuses","PrestoEngineSpec","functionality","."]
docstr: Return a modified URL with the username set.
  
  :param url: SQLAlchemy URL object
  :param impersonate_user: Flag indicating if impersonation is enabled
  :param username: Effective username
docstr_tok: ["Return","a","modified","URL","with","the","username","set",".",":","param","url",":","SQLAlchemy","URL","object",":","param","impersonate_user",":","Flag","indicating","if","impersonation","is","enabled",":","param","username",":","Effective","username"]
code: def get_url_for_impersonation(
      cls, url: URL, impersonate_user: bool, username: str | None
  ) -> URL:
      """
      Return a modified URL with the username set.
  
      :param url: SQLAlchemy URL object
      :param impersonate_user: Flag indicating if impersonation is enabled
      :param username: Effective username
      """
      # Do nothing in the URL object since instead this should modify
      # the configuration dictionary. See get_configuration_for_impersonation
      return url
  
imports: from __future__ import annotations
  import logging
  import os
  import re
  import tempfile
  import time
  from datetime import datetime
  from typing import Any, TYPE_CHECKING
  from urllib import parse
  import numpy
  import pandas
  import pyarrow
  import pyarrow.parquet
  from flask import current_app, g
  from sqlalchemy import Column, text, types
  from sqlalchemy.engine.base import Engine
  from sqlalchemy.engine.reflection import Inspector
  from sqlalchemy.engine.url import URL
  from sqlalchemy.sql.expression import ColumnClause, Select
  from superset import db
  from superset.common.db_query_status import QueryStatus
  from superset.constants import TimeGrain
  from superset.databases.utils import make_url_safe
  from superset.db_engine_specs.base import BaseEngineSpec
  from superset.db_engine_specs.presto import PrestoEngineSpec
  from superset.exceptions import SupersetException
  from superset.extensions import cache_manager
  from superset.models.sql_lab import Query
  from superset.sql_parse import ParsedQuery, Table
  from superset.superset_typing import ResultSetColumnType
label_desc: Use image node_id 18 for calling the HiveEngineSpec obj's underlying member method code with example usage: obj.get_url_for_impersonation(cls, url, impersonate_user, username) and returns: url