src/vs/platform/terminal/common/capabilities/terminalCapabilityStore.ts/TerminalCapabilityStoreMultiplexer/has
class TerminalCapabilityStoreMultiplexer:	has(capability: TerminalCapability): boolean {
		for (const store of this._stores) {
			for (const c of store.items) {
				if (c === capability) {
					return true;
				}
			}
		}
		return false;
	}