"is" getter naming allowed for non-booleans too

compiler/frontend.java/src/org/jetbrains/kotlin/synthetic/JavaSyntheticPropertiesScope.kt

@@ -32,7 +32,6 @@ import org.jetbrains.kotlin.resolve.scopes.JetScope
 import org.jetbrains.kotlin.resolve.scopes.JetScopeImpl
 import org.jetbrains.kotlin.storage.StorageManager
 import org.jetbrains.kotlin.types.*
-import org.jetbrains.kotlin.types.typeUtil.isBoolean
 import org.jetbrains.kotlin.types.typeUtil.isSubtypeOf
 import org.jetbrains.kotlin.types.typeUtil.isUnit
 import org.jetbrains.kotlin.util.capitalizeDecapitalize.capitalizeAsciiOnly
@@ -118,7 +117,6 @@ class JavaSyntheticPropertiesScope(storageManager: StorageManager) : JetScopeImp
     private fun isGoodGetMethod(descriptor: FunctionDescriptor): Boolean {
         val returnType = descriptor.returnType ?: return false
         if (returnType.isUnit()) return false
-        if (descriptor.name.asString().startsWith("is") && !returnType.isBoolean()) return false
 
         return descriptor.valueParameters.isEmpty()
                && descriptor.typeParameters.isEmpty()

compiler/testData/diagnostics/tests/syntheticExtensions/javaProperties/IsNaming.kt

@@ -4,7 +4,7 @@ fun foo(javaClass: JavaClass) {
     javaClass.isSomething2 = !javaClass.isSomething2
 
     javaClass.<!UNRESOLVED_REFERENCE!>something<!>
-    javaClass.<!FUNCTION_CALL_EXPECTED!>isSomethingWrong<!>
+    javaClass.isSomethingWrong
     javaClass.<!UNRESOLVED_REFERENCE!>somethingWrong<!>
 
     javaClass.<!FUNCTION_CALL_EXPECTED!>issueFlag<!>

j2k/src/org/jetbrains/kotlin/j2k/propertyDetection.kt

@@ -385,11 +385,6 @@ private class PropertyDetector(
         if (!Name.isValidIdentifier(name)) return null
         val propertyName = SyntheticJavaPropertyDescriptor.propertyNameByGetMethodName(Name.identifier(name))?.identifier ?: return null
 
-        if (name.startsWith("is")) {
-            val typeText = method.returnType?.canonicalText
-            if (typeText != "boolean" && typeText != "java.lang.Boolean") return null
-        }
-
         val returnType = method.returnType ?: return null
         if (returnType.canonicalText == "void") return null
         if (method.typeParameters.isNotEmpty()) return null

j2k/testData/fileOrElement/detectProperties/IsPrefix.kt

@@ -6,7 +6,7 @@ internal interface I {
 
     val isSomething2: Boolean?
 
-    fun isSomething3(): Int
+    val isSomething3: Int
 
     var isSomething4: Boolean