  (1:0-9) function f()            <--    (1:0-9) function f() 
          ^^^^^^^^^                              ^^^^^^^^^

 (1:9-10) ion f() {               <--   (1:9-10) ion f() {
              ^                                      ^

(1:10-13) on f() {                <--  (1:10-11) on f() {
              ^^^                                    ^

(1:10-13) on f() {                <--  (1:11-13) n f() {
              ^^^                                    ^^

(1:13-14) f() {                   <--  (1:13-14) f() {
              ^                                      ^

 (2:2-10)   switch (v) {          <--    (2:2-7)   try {
            ^^^^^^^^                               ^^^^^

 (2:2-10)   switch (v) {          <--    (3:4-8)     var _usi
            ^^^^^^^^                                 ^^^^

 (2:2-10)   switch (v) {          <--   (3:8-17) var _usingCtx = b
            ^^^^^^^^                                 ^^^^^^^^^

 (2:2-10)   switch (v) {          <--  (3:17-20) gCtx = babe
            ^^^^^^^^                                 ^^^

 (2:2-10)   switch (v) {          <--  (3:20-32) x = babelHelpers.usi
            ^^^^^^^^                                 ^^^^^^^^^^^^

 (2:2-10)   switch (v) {          <--  (3:32-33) pers.usin
            ^^^^^^^^                                 ^

 (2:2-10)   switch (v) {          <--  (3:33-41) ers.usingCtx();
            ^^^^^^^^                                 ^^^^^^^^

 (2:2-10)   switch (v) {          <--  (3:41-44) gCtx();
            ^^^^^^^^                                 ^^^

 (2:2-10)   switch (v) {          <--   (4:4-12)     switch (v) {
            ^^^^^^^^                                 ^^^^^^^^

(2:10-11) ch (v) {                <--  (4:12-13) ch (v) {
              ^                                      ^

(2:11-14) h (v) {                 <--  (4:13-16) h (v) {
              ^^^                                    ^^^

  (3:4-9)     case 0:             <--   (5:6-11)     case 0:
              ^^^^^                                  ^^^^^

 (3:9-10) ase 0:                  <--  (5:11-12) ase 0:
              ^                                      ^

(3:10-11) se 0:                   <--  (5:12-13) se 0:
              ^                                      ^

 (4:6-12)     using x =           <--   (6:8-14)     const x = 
              ^^^^^^                                 ^^^^^^

(4:12-13) ing x = 0               <--  (6:14-15) nst x = _
              ^                                      ^

(4:13-16) ng x = 0;               <--  (6:15-18) st x = _usi
              ^^^                                    ^^^

(4:13-16) ng x = 0;               <--  (6:18-27) x = _usingCtx.u(0
              ^^^                                    ^^^^^^^^^

(4:13-16) ng x = 0;               <--  (6:27-28) gCtx.u(0)
              ^^^                                    ^

(4:13-16) ng x = 0;               <--  (6:28-29) Ctx.u(0);
              ^^^                                    ^

(4:13-16) ng x = 0;               <--  (6:29-30) tx.u(0);
              ^^^                                    ^

(4:16-17) x = 0;                  <--  (6:30-31) x.u(0);
              ^                                      ^

(4:17-18)  = 0;                   <--  (6:31-33) .u(0);
              ^                                      ^^

 (5:6-12)     break;              <--   (7:8-14)     break;
              ^^^^^^                                 ^^^^^^

 (6:4-12)     default:            <--   (8:6-14)     default:
              ^^^^^^^^                               ^^^^^^^^

 (7:6-12)     using y =           <--   (9:8-14)     const y = 
              ^^^^^^                                 ^^^^^^

(7:12-13) ing y = 1               <--  (9:14-15) nst y = _
              ^                                      ^

(7:13-16) ng y = 1;               <--  (9:15-18) st y = _usi
              ^^^                                    ^^^

(7:13-16) ng y = 1;               <--  (9:18-27) y = _usingCtx.u(1
              ^^^                                    ^^^^^^^^^

(7:13-16) ng y = 1;               <--  (9:27-28) gCtx.u(1)
              ^^^                                    ^

(7:13-16) ng y = 1;               <--  (9:28-29) Ctx.u(1);
              ^^^                                    ^

(7:13-16) ng y = 1;               <--  (9:29-30) tx.u(1);
              ^^^                                    ^

(7:16-17) y = 1;                  <--  (9:30-31) x.u(1);
              ^                                      ^

(7:17-18)  = 1;                   <--  (9:31-33) .u(1);
              ^                                      ^^

 (8:6-12)     break;              <--  (10:8-14)     break;
              ^^^^^^                                 ^^^^^^

  (9:2-3)   };                    <--   (11:4-5)     }
            ^                                        ^

  (9:3-4)   };                    <--  (12:2-11)   } catch (_) {
             ^                                     ^^^^^^^^^

  (9:3-4)   };                    <--  (12:11-12) ch (_) {
             ^                                        ^

  (9:3-4)   };                    <--  (12:12-15) h (_) {
             ^                                        ^^^

  (9:3-4)   };                    <--  (13:4-13)     _usingCtx.e =
             ^                                       ^^^^^^^^^

  (9:3-4)   };                    <--  (13:13-14) gCtx.e = 
             ^                                        ^

  (9:3-4)   };                    <--  (13:14-15) Ctx.e = _
             ^                                        ^

  (9:3-4)   };                    <--  (13:15-18) tx.e = _;
             ^                                        ^^^

  (9:3-4)   };                    <--  (13:18-19) e = _;
             ^                                        ^

  (9:3-4)   };                    <--  (13:19-20)  = _;
             ^                                        ^

  (9:3-4)   };                    <--  (14:2-13)   } finally {
             ^                                     ^^^^^^^^^^^

  (9:3-4)   };                    <--  (15:4-13)     _usingCtx.d()
             ^                                       ^^^^^^^^^

  (9:3-4)   };                    <--  (15:13-14) gCtx.d();
             ^                                        ^

  (9:3-4)   };                    <--  (15:14-15) Ctx.d();
             ^                                        ^

  (9:3-4)   };                    <--  (15:15-18) tx.d();
             ^                                        ^^^

  (9:3-4)   };                    <--   (16:2-3)   }
             ^                                     ^

  (9:3-4)   };                    <--   (17:2-3)   ;
             ^                                     ^

 (10:0-1) }                       <--   (18:0-1) }
          ^                                      ^
