snake_case ↔ (convention) to name Identifier by concatenate words via _ delimiter

aka underscorecase

SCREAMING_SNAKE_CASE

(convention) to name Identifer as snake_case in ALLCAPS

References

1. _.snakeCase(string) ↔ return string with snake_case

2. SCREAMING_SNAKE_CASE ↔ (convention) to name Identifer as snake_case in ALLCAPS