assertNull(extractBuildscriptBlockFrom(script))
    }

    private
    fun extractBuildscriptBlockFrom(script: String) =
        lex(script, buildscript).document.topLevelBlocks.singleBlockSectionOrNull()?.wholeRange

    private
    fun extractPluginAndPluginManagementBlockFrom(script: String) =
        lex(script, pluginManagement, plugins).document.topLevelBlocks

        topLevelBlocks: List<TopLevelBlock>
    ) {
        topLevelBlockIds.forEach { id ->
            topLevelBlocks
                .filter { it.identifier === id }
                .singleBlockSectionOrNull()
        }
    }

    private
    fun ProgramSourceFragment.isNotBlank() =
        source.text.subSequence(section.block.first + 1, section.block.last).isNotBlank()
}


internal

            ProgramTarget.Settings -> buildscript
            ProgramTarget.Project -> buildscript
        }
    }
}


internal
fun List<TopLevelBlock>.singleBlockSectionOrNull(): ScriptSection? =
    when (size) {
        0 -> null
        1 -> get(0).section
        else -> {
            val unexpectedBlock = get(1)