get() = withValidityAssertion { descriptor.isSuspend }

    override val isOperator: Boolean
        get() = withValidityAssertion {
            if (descriptor.isDynamic()) {
                // For consistency with the K2 implementation, see `FirDynamicMembersStorage`
                return@withValidityAssertion true
            }
            descriptor.isOperator
        }

    override val isExternal: Boolean

            token,
        )
    }
    add(FirErrors.DATA_CLASS_CONSISTENT_COPY_AND_EXPOSED_COPY_ARE_INCOMPATIBLE_ANNOTATIONS) { firDiagnostic ->
        DataClassConsistentCopyAndExposedCopyAreIncompatibleAnnotationsImpl(
            firDiagnostic as KtPsiDiagnostic,
            token,
        )
    }
    add(FirErrors.DATA_CLASS_CONSISTENT_COPY_WRONG_ANNOTATION_TARGET) { firDiagnostic ->

        val extensionReceiver = this.extensionReceiver

        checkWithAttachment(
            (explicitReceiver != null) == (explicitReceiverPsiSupplement != null),
            { "FIR and PSI for explicit receiver are inconsistent (one of them is null)" }
        ) {
            withPsiEntry("explicitReceiverPsi", explicitReceiverPsiSupplement)
            if (explicitReceiver != null) {