src/vs/workbench/services/extensionManagement/browser/webExtensionsScannerService.ts/WebExtensionsScannerService/scanExtensionsUnderDevelopment
class WebExtensionsScannerService:	async scanExtensionsUnderDevelopment(): Promise<IExtension[]> {
		const devExtensions = this.environmentService.options?.developmentOptions?.extensions;
		const result: IExtension[] = [];
		if (Array.isArray(devExtensions)) {
			await Promise.allSettled(devExtensions.map(async devExtension => {
				try {
					const location = URI.revive(devExtension);
					if (URI.isUri(location)) {
						const webExtension = await this.toWebExtension(location);
						result.push(await this.toScannedExtension(webExtension, false));
					} else {
						this.logService.info(`Skipping the extension under development ${devExtension} as it is not URI type.`);
					}
				} catch (error) {
					this.logService.info(`Error while fetching the extension under development ${devExtension.toString()}.`, getErrorMessage(error));
				}
			}));
		}
		return result;
	}