In Guidewire, which naming convention should be avoided for private functions?

The recommendation to avoid the _Ext suffix for private functions aligns with best practices in naming conventions within Guidewire. This suffix suggests that a function is an extension or enhancement of another function, which can lead to confusion about the scope and intended use of the function, especially in a collaborative environment where multiple developers may be working on the same codebase. Clarity is vital in function names to ensure that the purpose and usage are immediately apparent to other developers.

In contrast, the other naming conventions mentioned serve valid purposes and can enhance the readability and maintainability of the code. LowerCamelCase is widely accepted in Java and similar languages for naming variables and methods, as it improves legibility. Verb+Noun syntax is often employed to clearly convey the action being performed on the noun, making the function's intent more explicit. Using all-uppercase letters is generally reserved for constants or enum values, which helps in distinguishing them from regular variables.

By adhering to best practices in naming conventions, particularly by avoiding misleading or ambiguous suffixes like _Ext for private functions, developers can contribute to a clearer, more understandable codebase, ultimately fostering better collaboration and reducing potential errors.