Helper to compare two {@code CharSequence} instances.
This uses {@link #isCaseSensitive()}.
@param cs1 the first character sequence, not null
@param offset1 the offset into the first sequence, valid
@param cs2 the second character sequence, not null
@param offset2 the offset into the second sequence, valid
@param length the length to check, valid
@return true if equal
Helper to compare two {@code CharSequence} instances. This uses {@link #isCaseSensitive()}.
@param cs1 the first character sequence, not null @param offset1 the offset into the first sequence, valid @param cs2 the second character sequence, not null @param offset2 the offset into the second sequence, valid @param length the length to check, valid @return true if equal