kotlin-node/karakum/src/jsMain/kotlin/node/karakum/injections/EventInjection.kt [232:261]:
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    ensure(isParameter(parameter))

    val parameterName = parameter.name
    ensure(isIdentifier(parameterName))
    ensure(parameterName.text == "event")

    nullable {
        val method = ensureNotNull(parameter.getParentOrNull())
        ensure(isMethodDeclaration(method))

        val methodName = ensureNotNull(method.name)
        ensure(isIdentifier(methodName))
        ensure(methodName.text in eventHandlerMethods)

        val classNode = ensureNotNull(method.getParentOrNull())
        ensure(isClassDeclaration(classNode))

        classNode
    } ?: nullable {
        val method = ensureNotNull(parameter.getParentOrNull())
        ensure(isMethodSignature(method))

        val methodName = ensureNotNull(method.name)
        ensure(isIdentifier(methodName))
        ensure(methodName.text in eventHandlerMethods)

        val interfaceNode = ensureNotNull(method.getParentOrNull())
        ensure(isInterfaceDeclaration(interfaceNode))

        interfaceNode
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kotlin-node/karakum/src/jsMain/kotlin/node/karakum/injections/EventMapInjection.kt [83:112]:
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    ensure(isParameter(parameter))

    val parameterName = parameter.name
    ensure(isIdentifier(parameterName))
    ensure(parameterName.text == "event")

    nullable {
        val method = ensureNotNull(parameter.getParentOrNull())
        ensure(isMethodDeclaration(method))

        val methodName = ensureNotNull(method.name)
        ensure(isIdentifier(methodName))
        ensure(methodName.text in eventHandlerMethods)

        val classNode = ensureNotNull(method.getParentOrNull())
        ensure(isClassDeclaration(classNode))

        classNode
    } ?: nullable {
        val method = ensureNotNull(parameter.getParentOrNull())
        ensure(isMethodSignature(method))

        val methodName = ensureNotNull(method.name)
        ensure(isIdentifier(methodName))
        ensure(methodName.text in eventHandlerMethods)

        val interfaceNode = ensureNotNull(method.getParentOrNull())
        ensure(isInterfaceDeclaration(interfaceNode))

        interfaceNode
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