*/
data class ProgramText private constructor(val text: String) {

    companion object {

        internal
        fun from(string: String) =
            ProgramText(string.replace("\r\n", "\n"))
    }

    internal
    fun erase(ranges: List<IntRange>): ProgramText =
        if (ranges.isEmpty()) this
        else ProgramText(text.erase(ranges))

                    scriptHost = same(scriptHost)
                )
            }
        }
    }

    private
    fun ProgramText.without(buildscript: Program.Buildscript, plugins: Program.Plugins) =
        erase(listOf(buildscript.fragment, plugins.fragment).map { it.range })

    private
    fun assertStagedTopLevelSettingsProgram(