See:-

1) https://github.com/manstis/kie-wb-common/commit/bde36c9a2f5b56d1adb13015c17ce0acbe77873d#commitcomment-23007534

2) https://github.com/manstis/kie-wb-common/commit/bde36c9a2f5b56d1adb13015c17ce0acbe77873d#commitcomment-23007734

3) <conan> manstis you want to extend AbstractOffsetMultiPointShape not AbstractDirectionalMultiPointShape as AbstractDirectionalMultiPointShape has 3 attributes, only applicable to orthogonal lines. you have neither a direction nor a direction.