src/vs/workbench/services/workspaces/common/workspaceTrust.ts/WorkspaceTrustManagementService/setParentFolderTrust
class WorkspaceTrustManagementService:	async setParentFolderTrust(trusted: boolean): Promise<void> {
		if (this.canSetParentFolderTrust()) {
			const workspaceUri = (toWorkspaceIdentifier(this._canonicalWorkspace) as ISingleFolderWorkspaceIdentifier).uri;
			const parentFolder = this.uriIdentityService.extUri.dirname(workspaceUri);

			await this.setUrisTrust([parentFolder], trusted);
		}
	}