isLowerCase static method
Returns true if string does not contain upper case letters
If string is null then we return true.
Example: print(isLowerCase("camelCase")); => false
print(isLowerCase("dart"));
=> true
print(isLowerCase(""));
=> false
print(isLowerCase(null));
=> false
Implementation
static bool isLowerCase(String? string) => Style.isLowerCase(string);