refactor for property.go

[pei0804]

Describe the PR
refactor for property.go

[codecov-io]

Codecov Report

Merging #352 into master will increase coverage by 0.16%.
The diff coverage is 96.15%.

@@            Coverage Diff             @@
##           master     #352      +/-   ##
==========================================
+ Coverage   85.43%   85.59%   +0.16%     
==========================================
  Files           7        7              
  Lines        1318     1305      -13     
==========================================
- Hits         1126     1117       -9     
+ Misses        111      109       -2     
+ Partials       81       79       -2

Impacted Files	Coverage Δ
parser.go	84.72% <100%> (ø)	⬆️
property.go	95.23% <96%> (+4.44%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 3335bb4...0b401fb. Read the comment docs.

[pei0804]

@easonlin404 review plz.

[easonlin404]

LGTM