isBlank function
Returns true if s is either null, empty or is solely made of whitespace
characters (as defined by String.trim).
Implementation
bool isBlank(String s) => s == null || s.trim().isEmpty;Returns true if s is either null, empty or is solely made of whitespace
characters (as defined by String.trim).
bool isBlank(String s) => s == null || s.trim().isEmpty;