trace should expose close function

[wzhai-hub]

==== JS stack trace =========================================

0: ExitFrame [pc: 0x55f7a153eef9]

Security context: 0x26f2f4a808a1
1: /* anonymous */ [0x225ce0ec43c1] ..........client/dist/src/reporters/remote_reporter.js:~66] [pc=0x530c1d0d7cc](this=0x225ce0ec9b01 )
2: listOnTimeout(aka listOnTimeout) [0x1089c7033d69] [internal/timers.js:~480] [pc=0x530c210d12d](this=0x0f1cd8bc04a9 ,...

FATAL ERROR: Ineffective mark-compacts near heap limit Allocation failed - JavaScript heap out of memory

How can I push code?

[yurishkuro]

API changes like adding new methods must be done at Specification level first.