test.kt:
#    0| [CompilationUnit] test
#    0|   1: [Class] TestKt
#    1|     1: [Method] fn
#    1|       3: [TypeAccess] Unit
#-----|       4: (Parameters)
#    1|         0: [Parameter] arr
#    1|           0: [TypeAccess] byte[]
#    1|         1: [Parameter] mt
#    1|           0: [TypeAccess] C
#    1|       5: [BlockStmt] { ... }
#    2|         0: [ExprStmt] <Expr>;
#    2|           0: [ImplicitCoercionToUnitExpr] <implicit coercion to unit>
#    2|             0: [TypeAccess] Unit
#    2|             1: [ArrayAccess] ...[...]
#    2|               0: [VarAccess] arr
#    2|               1: [IntegerLiteral] 1
#    3|         1: [ExprStmt] <Expr>;
#    3|           0: [ImplicitCoercionToUnitExpr] <implicit coercion to unit>
#    3|             0: [TypeAccess] Unit
#    3|             1: [MethodCall] get(...)
#    3|               -1: [TypeAccess] TestKt
#    3|               0: [VarAccess] arr
#    3|               1: [IntegerLiteral] 1
#    3|               2: [IntegerLiteral] 2
#    4|         2: [ExprStmt] <Expr>;
#    4|           0: [ImplicitCoercionToUnitExpr] <implicit coercion to unit>
#    4|             0: [TypeAccess] Unit
#    4|             1: [MethodCall] get(...)
#    4|               -1: [VarAccess] mt
#    4|               0: [IntegerLiteral] 1
#    4|               1: [IntegerLiteral] 2
#    6|         3: [ExprStmt] <Expr>;
#    6|           0: [ImplicitCoercionToUnitExpr] <implicit coercion to unit>
#    6|             0: [TypeAccess] Unit
#    6|             1: [MethodCall] set(...)
#    6|               -1: [TypeAccess] TestKt
#    6|               0: [VarAccess] arr
#    6|               1: [IntegerLiteral] 1
#    6|               2: [IntegerLiteral] 2
#    6|               3: [IntegerLiteral] 3
#    7|         4: [ExprStmt] <Expr>;
#    7|           0: [ImplicitCoercionToUnitExpr] <implicit coercion to unit>
#    7|             0: [TypeAccess] Unit
#    7|             1: [MethodCall] set(...)
#    7|               -1: [TypeAccess] TestKt
#    7|               0: [VarAccess] arr
#    7|               1: [IntegerLiteral] 1
#    7|               2: [ClassInstanceExpr] new C(...)
#    7|                 -3: [TypeAccess] C
#   10|     2: [ExtensionMethod] get
#   10|       3: [TypeAccess] String
#-----|       4: (Parameters)
#   10|         0: [Parameter] <this>
#   10|           0: [TypeAccess] byte[]
#   10|         1: [Parameter] i
#   10|           0: [TypeAccess] int
#   10|         2: [Parameter] j
#   10|           0: [TypeAccess] int
#   10|       5: [BlockStmt] { ... }
#   10|         0: [ReturnStmt] return ...
#   10|           0: [StringLiteral] ""
#   11|     3: [ExtensionMethod] set
#   11|       3: [TypeAccess] String
#-----|       4: (Parameters)
#   11|         0: [Parameter] <this>
#   11|           0: [TypeAccess] byte[]
#   11|         1: [Parameter] i
#   11|           0: [TypeAccess] int
#   11|         2: [Parameter] j
#   11|           0: [TypeAccess] int
#   11|         3: [Parameter] k
#   11|           0: [TypeAccess] int
#   11|       5: [BlockStmt] { ... }
#   11|         0: [ReturnStmt] return ...
#   11|           0: [StringLiteral] ""
#   12|     4: [ExtensionMethod] set
#   12|       3: [TypeAccess] String
#-----|       4: (Parameters)
#   12|         0: [Parameter] <this>
#   12|           0: [TypeAccess] byte[]
#   12|         1: [Parameter] i
#   12|           0: [TypeAccess] int
#   12|         2: [Parameter] c
#   12|           0: [TypeAccess] C
#   12|       5: [BlockStmt] { ... }
#   12|         0: [ReturnStmt] return ...
#   12|           0: [StringLiteral] ""
#   15|   2: [Class] C
#   15|     1: [Constructor] C
#   15|       5: [BlockStmt] { ... }
#   15|         0: [SuperConstructorInvocationStmt] super(...)
#   15|         1: [BlockStmt] { ... }
#   16|     2: [Method] get
#   16|       3: [TypeAccess] String
#-----|       4: (Parameters)
#   16|         0: [Parameter] i
#   16|           0: [TypeAccess] int
#   16|         1: [Parameter] j
#   16|           0: [TypeAccess] int
#   16|       5: [BlockStmt] { ... }
#   16|         0: [ReturnStmt] return ...
#   16|           0: [StringLiteral] ""