fixed optIn in expressions-converter

Author: Jolanrensen

plugins/expressions-converter/src/org/jetbrains/kotlinx/dataframe/ExplainerIrTransformer.kt

@@ -28,6 +28,7 @@ import org.jetbrains.kotlin.ir.expressions.impl.IrConstImpl
 import org.jetbrains.kotlin.ir.expressions.impl.IrFunctionExpressionImpl
 import org.jetbrains.kotlin.ir.expressions.impl.IrGetObjectValueImpl
 import org.jetbrains.kotlin.ir.expressions.impl.IrGetValueImpl
+import org.jetbrains.kotlin.ir.symbols.UnsafeDuringIrConstructionAPI
 import org.jetbrains.kotlin.ir.symbols.impl.IrSimpleFunctionSymbolImpl
 import org.jetbrains.kotlin.ir.symbols.impl.IrValueParameterSymbolImpl
 import org.jetbrains.kotlin.ir.types.classFqName
@@ -48,6 +49,7 @@ import java.io.File
 
 data class ContainingDeclarations(val clazz: IrClass?, val function: IrFunction?, val statementIndex: Int = 0)
 
+@OptIn(UnsafeDuringIrConstructionAPI::class)
 class ExplainerIrTransformer(val pluginContext: IrPluginContext) :
     FileLoweringPass,
     IrElementTransformer<ContainingDeclarations> {