adding onReady() function

Author: Tan108

src/main/kotlin/com/featurevisor/sdk/Conditions.kt

@@ -114,7 +114,7 @@ object Conditions {
             attributeValue is AttributeValue.StringValue && conditionValue is ConditionValue.ArrayValue -> {
                 when (operator) {
                     IN_ARRAY -> attributeValue.value in conditionValue.values
-                    NOT_IN_ARRAY -> (attributeValue.value in conditionValue.values).not()
+                    NOT_IN_ARRAY -> (attributeValue.value !in conditionValue.values)
                     else -> false
                 }
             }

src/main/kotlin/com/featurevisor/sdk/Instance.kt

@@ -7,8 +7,10 @@ import com.featurevisor.sdk.FeaturevisorError.MissingDatafileOptions
 import com.featurevisor.types.*
 import com.featurevisor.types.EventName.*
 import kotlinx.coroutines.Job
+import kotlinx.coroutines.suspendCancellableCoroutine
 import kotlinx.serialization.decodeFromString
 import kotlinx.serialization.json.Json
+import kotlin.coroutines.resume
 
 typealias ConfigureBucketKey = (Feature, Context, BucketKey) -> BucketKey
 typealias ConfigureBucketValue = (Feature, Context, BucketValue) -> BucketValue
@@ -122,6 +124,22 @@ class FeaturevisorInstance private constructor(options: InstanceOptions) {
         this.logger?.setLevels(levels)
     }
 
+    suspend fun onReady(): FeaturevisorInstance {
+        return suspendCancellableCoroutine { continuation ->
+            if (this.statuses.ready) {
+                continuation.resume(this)
+            }
+
+            val cb :(result:Array<out Any>) -> Unit = {
+                this.emitter.removeListener(READY)
+                continuation.resume(this)
+            }
+
+            this.emitter.addListener(READY,cb)
+        }
+    }
+
+
     fun setDatafile(datafileJSON: String) {
         val data = datafileJSON.toByteArray(Charsets.UTF_8)
         try {