/**
* Returns true if the given lazy string is a prefix of this lazy string.
*
* @param cs A string to find at the start of this lazy string.
* @return True if the given string is a prefix of this lazy string, otherwise False.
*/
public boolean startsWith(final LazyString cs) {
return cs.isEmpty()
|| !isEmpty() && charEqual.eq(head(), cs.head()) && tail().startsWith(cs.tail());
}
/**
* Returns true if the given lazy string is a suffix of this lazy string.
*
* @param cs A string to find at the end of this lazy string.
* @return True if the given string is a suffix of this lazy string, otherwise False.
*/
public boolean endsWith(final LazyString cs) {
return reverse().startsWith(cs.reverse());
}