newSection(new RepositoriesBuilder()) {
            BuilderSupport.applyConfiguration(spec, it)
        }
        this
    }

    BuildFileBuilder configurations(@DelegatesTo(value = ConfigurationsBuilder, strategy = Closure.DELEGATE_FIRST) Closure<?> spec) {
        newSection(new ConfigurationsBuilder(configurationNames)) {

import java.util.function.Supplier

abstract class MultiSectionHandler<T> implements SectionBuilder {
    final List<SectionBuilder> sections = []

    public <B extends SectionBuilder> B newSection(@DelegatesTo.Target B section, @DelegatesTo(strategy = Closure.DELEGATE_FIRST) Closure<?> spec) {
        sections << section
        BuilderSupport.applyConfiguration(spec, section)
        section
    }

// future (not yet interspersed) comments in this function.
func (p *printer) linebreak(line, min int, ws whiteSpace, newSection bool) (nbreaks int) {
	n := max(nlimit(line-p.pos.Line), min)
	if n > 0 {
		p.print(ws)
		if newSection {
			p.print(formfeed)
			n--
			nbreaks = 2
		}
		nbreaks += n
		for ; n > 0; n-- {
			p.print(newline)
		}
	}
	return
}

	if int(i) >= len(l.symSects) {
		l.symSects = append(l.symSects, make([]uint16, l.NSym()-len(l.symSects))...)
	}
	l.symSects[i] = sect.Index
}

// NewSection creates a new (output) section.
func (l *Loader) NewSection() *sym.Section {
	sect := new(sym.Section)
	idx := len(l.sects)
	if idx != int(uint16(idx)) {
		panic("too many sections created")
	}
	sect.Index = uint16(idx)

	ctxt.Shlibs = append(ctxt.Shlibs, Shlib{Path: libpath, Hash: hash, Deps: deps, File: f})
}

func addsection(ldr *loader.Loader, arch *sys.Arch, seg *sym.Segment, name string, rwx int) *sym.Section {
	sect := ldr.NewSection()
	sect.Rwx = uint8(rwx)
	sect.Name = name
	sect.Seg = seg
	sect.Align = int32(arch.PtrSize) // everything is at least pointer-aligned
	seg.Sections = append(seg.Sections, sect)
	return sect
}

                    new_title = first_child.title or new_title
            # Creating a new section makes it render it collapsed by default
            # no idea why, so, let's just modify the existing one
            # new_section = Section(title=new_title, children=new_children)
            item.title = new_title
            item.children = new_children
            new_items.append(item)
        else:
            new_items.append(item)

type ActionNode struct {
	NodeType
	Pos
	tr   *Tree
	Line int       // The line number in the input. Deprecated: Kept for compatibility.
	Pipe *PipeNode // The pipeline in the action.
}

func (t *Tree) newAction(pos Pos, line int, pipe *PipeNode) *ActionNode {
	return &ActionNode{tr: t, NodeType: NodeAction, Pos: pos, Line: line, Pipe: pipe}
}

func (a *ActionNode) String() string {
	var sb strings.Builder
	a.writeTo(&sb)

	case itemTemplate:
		return t.templateControl()
	case itemWith:
		return t.withControl()
	}
	t.backup()
	token := t.peek()
	// Do not pop variables; they persist until "end".
	return t.newAction(token.pos, token.line, t.pipeline("command", itemRightDelim))
}

// Break:
//
//	{{break}}
//
// Break keyword is past.
func (t *Tree) breakControl(pos Pos, line int) Node {