<?php  namespace App\Services\Analytics;  use App\Models\Customer; use Illuminate\Support\Facades\DB;  class CustomerAnalyticsService { 	public function getCustomerCount(string $startDate, string $endDate, string $country): int{}  	public function getTopCountriesByInvoiceAddress(string $startDate, string $endDate): array{}  	public function getTopCustomersByInvoiceAddress(string $startDate, string $endDate): array{} }