Function split_camel_case 

pub fn split_camel_case(input: &str) -> Vec<String>

Splits a string on camel case boundaries This function handles:

• camelCase -> [“camel”, “case”]
• PascalCase -> [“pascal”, “case”]
• acronyms and numbers -> [“parse”, “json”, “to”, “html”, “5”]
• special cases like OAuth2 -> [“oauth2”]
• also attempts to split lowercase identifiers that might have been camelCase originally