kotlin-fork/docs/analysis/development-process/code-style.md

Analysis API Code Style

This is a code style for Analysis API modules which are located in analysis directory

• Please, follow official Kotlin code style.
• IntelliJ IDEA is set up for these coding guidelines and the default formatter will help you a lot.
• Consider using introducing explicit lambda parameter instead of implicit it parameter when:
  • The lambda is multi-line, so includes multiple statements
  • The it parameter is used multiple times inside lambda
• Do not overuse let, also, apply and similar functions. It seems cool to write a complex multiline function as a single expression but please, do not sacrifice code readability because of that.