is
The method is used to check whether the email is valid. An email is valid if, and only if, it is not blank(ie. is not empty and doesn't contain whitespace characters) and matches the Patterns.EMAIL_ADDRESS regex.
The method is used to check whether the email is valid. An email is valid if, and only if, it is not blank(ie. is not empty and doesn't contain whitespace characters) and matches the Patterns.EMAIL_ADDRESS regex.