OptionaldefaultIndentation: string | numberthe indentation to be applied if no explicit indentation is configured
for particular IndentNodes, either a string or a number of repeated single spaces,
defaults to 4 single spaces, see processGeneratorNode -> Context.
an object of type { text: string, trace: TraceRegion } containing the desired text and trace data
Converts instances of GeneratorNode into
textaccompanied by a correspondingtrace.