amend: modify several parameters in RequestRuleWrap nullable

[tangcent]

fix #982

[codecov-commenter]

Codecov Report

Merging #984 (c724cad) into master (e0a92dc) will not change coverage.
The diff coverage is n/a.

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@@             Coverage Diff             @@
##              master      #984   +/-   ##
===========================================
  Coverage     59.621%   59.621%           
+ Complexity      2338      2337    -1     
===========================================
  Files            262       262           
  Lines          12353     12353           
  Branches        3056      3056           
===========================================
  Hits            7365      7365           
  Misses          3333      3333           
  Partials        1655      1655           

Flag	Coverage Δ
unittests	59.621% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...a/plugin/api/export/core/RequestBuilderListener.kt	100.000% <ø> (ø)
...ent/idea/plugin/api/export/rule/RequestRuleWrap.kt	78.673% <ø> (ø)

... and 2 files with indirect coverage changes

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