Update the builder creation guidelines to clarify that the builder constructor must be public even if Kotlin users are expected to implicitly leverage the builder through a factory method/dsl style creation mechanism.

PiperOrigin-RevId: 633242814
Change-Id: I728aa13bab2e3b13a2d0dfedf55f166333aea9a0
1 file changed
tree: c8c411da55414e62920982a7608b4b8313893d4c
  1. api-guidelines/