It is recommended to use the latest released version of Intellij IDEA (Community or Ultimate Edition). You can download IntelliJ IDEA [here](https://www.jetbrains.com/idea/download).

After cloning the project, import the project in IntelliJ by choosing the project directory in the Open project dialog.

For handy work with compiler tests it's recommended to use [

        // resolve individual parts of it because in FIR, the entire qualified access is one element.
        if (referencedClass.isLocal) {
            // TODO: handle local classes after KT-47135 is fixed
            return referencedSymbolsByFir
        } else {
            var qualifiedAccess: KtDotQualifiedExpression = fullQualifiedAccess
            val referencedClassId =

            if (containingFile == null || containingFile.declarations.firstOrNull() !is FirScript) {
                // Should be replaced with proper check after KT-61451 and KT-61887
                return false
            }
        }

        val firSymbol = symbol.firSymbol
        if (firSymbol is FirPropertySymbol && firSymbol.isForeignValue) {

     * When resolving the calleeExpression of a `KtCallExpression`, we resolve the entire `KtCallExpression` instead. This way, the
     * corresponding FIR element is the `FirFunctionCall`, etc. Implicit invoke is then specially handled after obtaining the
     * `FirImplicitInvokeCall`.
     *
     * Note that, if the calleeExpression is already a KtCallExpression, then we don't do this because such a callExpression can be properly

            /**
             * IR for code fragment is not fully correct until `patchCodeFragmentIr` is over.
             * Because of that we run IR plugins manually after patching and don't pass any extension to fir2ir conversion in `runFir2Ir` method
             */
            irGeneratorExtensions = emptyList()
        )

        patchCodeFragmentIr(targetFir2IrResult)