class CKEditor5::Rails::Presets::ToolbarBuilder

def append(*appended_items, after: nil)
  if after
    index = items.index(after)
    raise ArgumentError, "Item '#{after}' not found in array" unless index
    items.insert(index + 1, *appended_items)
  else
    items.push(*appended_items)
  end
end

def initialize(items)
  @items = items
end

def prepend(*prepended_items, before: nil)
  if before
    index = items.index(before)
    raise ArgumentError, "Item '#{before}' not found in array" unless index
    items.insert(index, *prepended_items)
  else
    items.insert(0, *prepended_items)
  end
end

def remove(*removed_items)
  removed_items.each { |item| items.delete(item) }
end