src/vs/platform/policy/common/policyIpc.ts/PolicyChannel/call
class PolicyChannel:	call(_: unknown, command: string, arg?: any): Promise<any> {
		switch (command) {
			case 'registerPolicyDefinitions': return this.service.registerPolicyDefinitions(arg as IStringDictionary<PolicyDefinition>);
		}

		throw new Error(`Call not found: ${command}`);
	}