Function modSpacing

modSpacing(f: EndoOf<number>): EndoOf<Draw.Theme>
Function
Modify the vertical spacing of a tree theme using the given function.
Parameters
- f: EndoOf<number>
  Will be given the vertical spacing and expected to return an updated value.
Returns EndoOf<Draw.Theme>
- Defined in src/draw/tree/theme/data.ts:168