Code cleanup

app/src/main/java/exh/metadata/metadata/base/FlatMetadata.kt

@@ -16,7 +16,7 @@ data class FlatMetadata(
 ) {
     inline fun <reified T : RaisedSearchMetadata> raise(): T = raise(T::class)
 
-    fun <T : RaisedSearchMetadata> raise(clazz: KClass<T>) =
+    fun <T : RaisedSearchMetadata> raise(clazz: KClass<T>): T =
         RaisedSearchMetadata.raiseFlattenGson
             .fromJson(metadata.extra, clazz.java).apply {
                 fillBaseFields(this@FlatMetadata)
@@ -84,7 +84,7 @@ private fun <T> preparedOperationFromSingle(single: Single<T>): PreparedOperatio
     }
 }
 
-fun DatabaseHelper.insertFlatMetadata(flatMetadata: FlatMetadata) = Completable.fromCallable {
+fun DatabaseHelper.insertFlatMetadata(flatMetadata: FlatMetadata): Completable = Completable.fromCallable {
     require(flatMetadata.metadata.mangaId != -1L)
 
     inTransaction {

app/src/main/java/exh/metadata/metadata/base/RaisedSearchMetadata.kt

@@ -1,6 +1,7 @@
 package exh.metadata.metadata.base
 
 import android.content.Context
+import com.google.gson.Gson
 import com.google.gson.GsonBuilder
 import eu.kanade.tachiyomi.source.model.SManga
 import exh.metadata.forEach
@@ -121,7 +122,7 @@ abstract class RaisedSearchMetadata {
             (this).filter { it.type != TAG_TYPE_VIRTUAL }
                 .joinToString { (if (it.namespace != null) "${it.namespace}: " else "") + it.name }
 
-        val raiseFlattenGson = GsonBuilder().create()
+        val raiseFlattenGson: Gson = GsonBuilder().create()
 
         fun titleDelegate(type: Int) = object : ReadWriteProperty<RaisedSearchMetadata, String?> {
             /**