code: public String[] getPreReleaseParts() {
          if (this.preReleaseParts.length == 0) {
              return EMPTY_ARRAY;
          }
          return Arrays.copyOf(this.preReleaseParts, this.preReleaseParts.length);
      }
docs: Gets the pre release identifier parts of this version as array. Modifying the
  resulting array will have no influence on the internal state of this object.
  
  @return Pre release version as array. Array is empty if this version has no pre
  release part.