Implement a Java/Kotlin client.

Sources/StableDiffusionControl/StableDiffusionClient.swift

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+import Foundation
+import GRPC
+import NIO
+import StableDiffusionCore
+import StableDiffusionProtos
+
+struct StableDiffusionClient {
+    let group: EventLoopGroup
+    let channel: GRPCChannel
+
+    let modelService: SdModelServiceAsyncClient
+    let imageGenerationService: SdImageGenerationServiceAsyncClient
+
+    init(connectionTarget: ConnectionTarget, transportSecurity: GRPCChannelPool.Configuration.TransportSecurity) throws {
+        group = PlatformSupport.makeEventLoopGroup(loopCount: 1)
+
+        channel = try GRPCChannelPool.with(
+            target: connectionTarget,
+            transportSecurity: transportSecurity,
+            eventLoopGroup: group
+        )
+
+        modelService = SdModelServiceAsyncClient(channel: channel)
+        imageGenerationService = SdImageGenerationServiceAsyncClient(channel: channel)
+    }
+
+    func close() async throws {
+        try await group.shutdownGracefully()
+    }
+}