code: public static ConstructorDeclaration mergeConstructor(ConstructorDeclaration one, ConstructorDeclaration two) {
  
          if (isAllNull(one, two)) return null;
  
          ConstructorDeclaration cd = null;
  
          if (isAllNotNull(one, two)) {
  
              cd = new ConstructorDeclaration();
  
              cd.setName(one.getName());
              cd.setComment(mergeSelective(one.getComment(), two.getComment()));
              cd.setAnnotations(mergeListNoDuplicate(one.getAnnotations(), two.getAnnotations()));
              cd.setModifiers(mergeModifiers(one.getModifiers(), two.getModifiers()));
              cd.setJavaDoc(mergeSelective(one.getJavaDoc(), two.getJavaDoc()));
              cd.setThrows(mergeListNoDuplicate(one.getThrows(), two.getThrows()));
              cd.setTypeParameters(findFirstNotNull(one.getTypeParameters(), two.getTypeParameters()));
              cd.setParameters(mergeParameters(one.getParameters(), two.getParameters()));
  
              cd.setBlock(mergeBlock(one.getBlock(), two.getBlock()));
  
              LOG.info("merge ConstructorDeclaration --> {}", cd.getName());
  
          } else {
              cd = findFirstNotNull(one, two);
              LOG.info("add ConstructorDeclaration --> {}", cd.getName());
          }
  
          return cd;
      }
docs: /*
  合并构造函数