def _setup_component(hass, domain, config):
    # pylint: disable=too-many-return-statements,too-many-branches
    if domain in hass.config.components:
        return True

    with _SETUP_LOCK:
        # It might have been loaded while waiting for lock
        if domain in hass.config.components:
            return True

        if domain in _CURRENT_SETUP:
            _LOGGER.error('Attempt made to setup %s during setup of %s',
                          domain, domain)
            return False

        component = loader.get_component(domain)
        missing_deps = [dep for dep in getattr(component, 'DEPENDENCIES', [])
                        if dep not in hass.config.components]

        if missing_deps:
            _LOGGER.error(
                'Not initializing %s because not all dependencies loaded: %s',
                domain, ", ".join(missing_deps))
            return False

        if hasattr(component, 'CONFIG_SCHEMA'):
            try:
                config = component.CONFIG_SCHEMA(config)
            except vol.MultipleInvalid as ex:
                _LOGGER.error('Invalid config for [%s]: %s', domain, ex)
                return False

        elif hasattr(component, 'PLATFORM_SCHEMA'):
            platforms = []
            for p_name, p_config in config_per_platform(config, domain):
                # Validate component specific platform schema
                try:
                    p_validated = component.PLATFORM_SCHEMA(p_config)
                except vol.MultipleInvalid as ex:
                    _LOGGER.error('Invalid platform config for [%s]: %s. %s',
                                  domain, ex, p_config)
                    return False

                # Not all platform components follow same pattern for platforms
                # Sof if p_name is None we are not going to validate platform
                # (the automation component is one of them)
                if p_name is None:
                    platforms.append(p_validated)
                    continue

                platform = prepare_setup_platform(hass, config, domain,
                                                  p_name)

                if platform is None:
                    return False

                # Validate platform specific schema
                if hasattr(platform, 'PLATFORM_SCHEMA'):
                    try:
                        p_validated = platform.PLATFORM_SCHEMA(p_validated)
                    except vol.MultipleInvalid as ex:
                        _LOGGER.error(
                            'Invalid platform config for [%s.%s]: %s. %s',
                            domain, p_name, ex, p_config)
                        return False

                platforms.append(p_validated)

            # Create a copy of the configuration with all config for current
            # component removed and add validated config back in.
            filter_keys = extract_domain_configs(config, domain)
            config = {key: value for key, value in config.items()
                      if key not in filter_keys}
            config[domain] = platforms

        if not _handle_requirements(hass, component, domain):
            return False

        _CURRENT_SETUP.append(domain)

        try:
            if not component.setup(hass, config):
                _LOGGER.error('component %s failed to initialize', domain)
                return False
        except Exception:  # pylint: disable=broad-except
            _LOGGER.exception('Error during setup of component %s', domain)
            return False
        finally:
            _CURRENT_SETUP.remove(domain)

        hass.config.components.append(component.DOMAIN)

        # Assumption: if a component does not depend on groups
        # it communicates with devices
        if group.DOMAIN not in getattr(component, 'DEPENDENCIES', []):
            hass.pool.add_worker()

        hass.bus.fire(
            EVENT_COMPONENT_LOADED, {ATTR_COMPONENT: component.DOMAIN})

        return True
Returns a ApplicationCache Object to interact with the browser app cache
dataset/ETHPy150Open home-assistant/home-assistant/homeassistant/bootstrap.py/_setup_component--crossover with--dataset/ETHPy150Open apiad/sublime-browser-integration/selenium/webdriver/remote/webdriver.py/WebDriver.application_cache