docs: public StrBuilder getChars(int srcBegin, int srcEnd, char[] dst, int dstBegin) {
  		if (srcBegin < 0) {
  			srcBegin = 0;
  		}
  		if (srcEnd < 0) {
  			srcEnd = 0;
  		} else if (srcEnd > this.position) {
  			srcEnd = this.position;
  		}
  		if (srcBegin > srcEnd) {
  			throw new StringIndexOutOfBoundsException("srcBegin > srcEnd");
  		}
  		System.arraycopy(value, srcBegin, dst, dstBegin, srcEnd - srcBegin);
  		return this;
  	}