fun `given a plugins block before a pluginManagement block it throws UnexpectedBlockOrder`() {
        val topLevelBlocks = extractPluginAndPluginManagementBlockFrom("plugins {} pluginManagement {}")
        try {
            checkForTopLevelBlockOrder(topLevelBlocks)
            fail("Expecting ${UnexpectedBlockOrder::class.simpleName}!")
        } catch (unexpectedBlock: UnexpectedBlockOrder) {

    val firstTopLevelBlock = topLevelBlocks.first()
    if (firstTopLevelBlock.identifier != TopLevelBlockId.pluginManagement) {
        throw UnexpectedBlockOrder(firstTopLevelBlock.identifier, firstTopLevelBlock.range, pluginManagementBlock.identifier)
    }
}


private
fun List<TopLevelBlock>.singleSectionOf(topLevelBlockId: TopLevelBlockId) =

    UnexpectedBlock("Unexpected `$identifier` block found. Only one `$identifier` block is allowed per script.")


internal
class UnexpectedBlockOrder(val identifier: TopLevelBlockId, override val location: IntRange, expectedFirstIdentifier: TopLevelBlockId) :
    UnexpectedBlock("Unexpected `$identifier` block found. `$identifier` can not appear before `$expectedFirstIdentifier`.")