?.map { it.effectDeclarationToAnalysisApi(analysisContext) }
            .orEmpty()
    }

    override val isSuspend: Boolean
        get() = withValidityAssertion { psi.hasModifier(KtTokens.SUSPEND_KEYWORD) }

    override val isOperator: Boolean
        get() = withValidityAssertion { psi.hasModifier(KtTokens.OPERATOR_KEYWORD) }

    override val isExternal: Boolean

            token,
        )
    }
    add(FirErrors.RETURN_FOR_BUILT_IN_SUSPEND) { firDiagnostic ->
        ReturnForBuiltInSuspendImpl(
            firDiagnostic as KtPsiDiagnostic,
            token,
        )
    }
    add(FirErrors.MIXING_SUSPEND_AND_NON_SUSPEND_SUPERTYPES) { firDiagnostic ->
        MixingSuspendAndNonSuspendSupertypesImpl(
            firDiagnostic as KtPsiDiagnostic,

- [`KT-58332`](https://youtrack.jetbrains.com/issue/KT-58332) K2: local fun with suspend type is not marked as suspend in IR
- [`KT-57991`](https://youtrack.jetbrains.com/issue/KT-57991) K2: Modifier 'suspend' is not applicable to 'anonymous function'