The most basic concept in collage is that of a context. As its base a context is simply the representation of a uniquely identified fragment and the connection to a potential parent.
This takes no argument.
And creates the following context api:
{
// unique (uuidv4) context id
id: 'xxxx-xxxx-xxxx-xxxx'
// wether we are embedded in another arrangement
hasArrangement: true || false
}