src/vs/platform/userDataSync/common/keybindingsSync.ts/KeybindingsSynchroniser/resolveContent
class KeybindingsSynchroniser:	override async resolveContent(uri: URI): Promise<string | null> {
		if (this.extUri.isEqual(this.remoteResource, uri)
			|| this.extUri.isEqual(this.baseResource, uri)
			|| this.extUri.isEqual(this.localResource, uri)
			|| this.extUri.isEqual(this.acceptedResource, uri)
		) {
			return this.resolvePreviewContent(uri);
		}
		let content = await super.resolveContent(uri);
		if (content) {
			return content;
		}
		content = await super.resolveContent(this.extUri.dirname(uri));
		if (content) {
			const syncData = this.parseSyncData(content);
			if (syncData) {
				switch (this.extUri.basename(uri)) {
					case 'keybindings.json':
						return getKeybindingsContentFromSyncContent(syncData.content, this.syncKeybindingsPerPlatform(), this.logService);
				}
			}
		}
		return null;
	}