src/vs/platform/configuration/common/configurationModels.ts/Configuration/getFolderConfigurationModelForResource
class Configuration:	private getFolderConfigurationModelForResource(resource: URI | null | undefined, workspace: Workspace | undefined): ConfigurationModel | undefined {
		if (workspace && resource) {
			const root = workspace.getFolder(resource);
			if (root) {
				return this._folderConfigurations.get(root.uri);
			}
		}
		return undefined;
	}