Yson.Schema.reference

You're seeing just the macro reference, go back to Yson.Schema module for more information.
Link to this macro

reference(reference)

View Source (macro)

References a map or an interface by name.

The referenced map/interface should be defined outside the root/2 macro scope.

Example

map :any do
  reference(:referenced)
end

map :referenced do
  value(:name)
end