}

    interface FunctionCallExpected : KtFirDiagnostic<PsiElement> {
        override val diagnosticClass get() = FunctionCallExpected::class
        val functionName: String
        val hasValueParameters: Boolean
    }

    interface IllegalSelector : KtFirDiagnostic<PsiElement> {
        override val diagnosticClass get() = IllegalSelector::class
    }

    firDiagnostic: KtPsiDiagnostic,
    token: KtLifetimeToken,
) : KtAbstractFirDiagnostic<PsiElement>(firDiagnostic, token), KtFirDiagnostic.NoConstructor

internal class FunctionCallExpectedImpl(
    override val functionName: String,
    override val hasValueParameters: Boolean,
    firDiagnostic: KtPsiDiagnostic,
    token: KtLifetimeToken,
) : KtAbstractFirDiagnostic<PsiElement>(firDiagnostic, token), KtFirDiagnostic.FunctionCallExpected

	a bit.
-->

<p>
A function declaration binds an identifier, the <i>function name</i>,
to a function.
</p>

<pre class="ebnf">
FunctionDecl = "func" FunctionName [ TypeParameters ] Signature [ FunctionBody ] .
FunctionName = identifier .
FunctionBody = Block .
</pre>

<p>
If the function's <a href="#Function_types">signature</a> declares