refactor: make WeakHashMap internal

antlr-kotlin-runtime/src/commonMain/kotlin/com/strumenta/antlrkotlin/runtime/WeakHashMap.kt

@@ -2,7 +2,7 @@
 // Copyright 2024-present Strumenta and contributors, licensed under BSD 3-Clause.
 package com.strumenta.antlrkotlin.runtime
 
-public expect class WeakHashMap<K, V>() : MutableMap<K, V> {
+internal expect class WeakHashMap<K, V>() : MutableMap<K, V> {
   override val size: Int
   override val entries: MutableSet<MutableMap.MutableEntry<K, V>>
   override val keys: MutableSet<K>

antlr-kotlin-runtime/src/jsAndWasmSharedMain/kotlin/com/strumenta/antlrkotlin/runtime/WeakHashMap.kt

@@ -1,8 +1,8 @@
 // Copyright 2017-present Strumenta and contributors, licensed under Apache 2.0.
 // Copyright 2024-present Strumenta and contributors, licensed under BSD 3-Clause.
-
 package com.strumenta.antlrkotlin.runtime
 
 // Note(Edoardo): this is implemented as an HashMap in the JS target,
 //  so let's keep it as it is
-public actual typealias WeakHashMap<K, V> = HashMap<K, V>
+@Suppress("ACTUAL_WITHOUT_EXPECT")
+internal actual typealias WeakHashMap<K, V> = HashMap<K, V>

antlr-kotlin-runtime/src/jvmMain/kotlin/com/strumenta/antlrkotlin/runtime/WeakHashMap.kt

@@ -1,8 +1,8 @@
 // Copyright 2017-present Strumenta and contributors, licensed under Apache 2.0.
 // Copyright 2024-present Strumenta and contributors, licensed under BSD 3-Clause.
-
 package com.strumenta.antlrkotlin.runtime
 
 import java.util.WeakHashMap as JavaWeakHashMap
 
-public actual typealias WeakHashMap<K, V> = JavaWeakHashMap<K, V>
+@Suppress("ACTUAL_WITHOUT_EXPECT")
+internal actual typealias WeakHashMap<K, V> = JavaWeakHashMap<K, V>

antlr-kotlin-runtime/src/nativeMain/kotlin/com/strumenta/antlrkotlin/runtime/WeakHashMap.kt

@@ -1,9 +1,9 @@
 // Copyright 2017-present Strumenta and contributors, licensed under Apache 2.0.
 // Copyright 2024-present Strumenta and contributors, licensed under BSD 3-Clause.
-
 package com.strumenta.antlrkotlin.runtime
 
 // TODO(Edoardo): implement real weak keys.
 //  See kotlinlang.org/api/latest/jvm/stdlib/kotlin.native.ref
 //  for classes and functions useful for a possible implementation
-public actual typealias WeakHashMap<K, V> = HashMap<K, V>
+@Suppress("ACTUAL_WITHOUT_EXPECT")
+internal actual typealias WeakHashMap<K, V> = HashMap<K, V>

antlr-kotlin-runtime/src/wasmWasiMain/kotlin/com/strumenta/antlrkotlin/runtime/WeakHashMap.kt

@@ -3,4 +3,5 @@
 package com.strumenta.antlrkotlin.runtime
 
 // TODO(Edoardo): implement real weak keys
-public actual typealias WeakHashMap<K, V> = HashMap<K, V>
+@Suppress("ACTUAL_WITHOUT_EXPECT")
+internal actual typealias WeakHashMap<K, V> = HashMap<K, V>