Assignments.cs:
#    1| [Class] Assignments
#    3|   6: [Method] M
#    3|     -1: [TypeMention] Void
#    4|     4: [BlockStmt] {...}
#    5|       0: [LocalVariableDeclStmt] ... ...;
#    5|         0: [LocalVariableDeclAndInitExpr] Int32 x = ...
#    5|           -1: [TypeMention] int
#    5|           0: [LocalVariableAccess] access to local variable x
#    5|           1: [IntLiteral] 0
#    6|       1: [ExprStmt] ...;
#    6|         0: [AssignAddExpr] ... += ...
#    6|           0: [LocalVariableAccess] access to local variable x
#    6|           1: [IntLiteral] 1
#    8|       2: [LocalVariableDeclStmt] ... ...;
#    8|         0: [LocalVariableDeclAndInitExpr] dynamic d = ...
#    8|           -1: [TypeMention] dynamic
#    8|           0: [LocalVariableAccess] access to local variable d
#    8|           1: [CastExpr] (...) ...
#    8|             1: [IntLiteral] 0
#    9|       3: [ExprStmt] ...;
#    9|         0: [AssignSubExpr] ... -= ...
#    9|           0: [LocalVariableAccess] access to local variable d
#    9|           1: [IntLiteral] 2
#   11|       4: [LocalVariableDeclStmt] ... ...;
#   11|         0: [LocalVariableDeclAndInitExpr] Assignments a = ...
#   11|           -1: [TypeMention] Assignments
#   11|           0: [LocalVariableAccess] access to local variable a
#   11|           1: [ObjectCreation] object creation of type Assignments
#   11|             0: [TypeMention] Assignments
#   12|       5: [ExprStmt] ...;
#   12|         0: [AssignAddExpr] ... += ...
#   12|           0: [LocalVariableAccess] access to local variable a
#   12|           1: [ThisAccess] this access
#   14|       6: [ExprStmt] ...;
#   14|         0: [AddEventExpr] ... += ...
#   14|           0: [EventAccess,EventCall] access to event Event
#   14|           1: [LambdaExpr] (...) => ...
#-----|             2: (Parameters)
#   14|               0: [Parameter] sender
#   14|               1: [Parameter] e
#   14|             4: [BlockStmt] {...}
#   17|   7: [AddOperator] +
#   17|     -1: [TypeMention] Assignments
#-----|     2: (Parameters)
#   17|       0: [Parameter] x
#   17|         -1: [TypeMention] Assignments
#   17|       1: [Parameter] y
#   17|         -1: [TypeMention] Assignments
#   18|     4: [BlockStmt] {...}
#   19|       0: [ReturnStmt] return ...;
#   19|         0: [ParameterAccess] access to parameter x
#   22|   8: [DelegateType] EventHandler
#-----|     2: (Parameters)
#   22|       0: [Parameter] sender
#   22|         -1: [TypeMention] object
#   22|       1: [Parameter] e
#   22|         -1: [TypeMention] object
#   23|   9: [Event] Event
#   23|     -1: [TypeMention] EventHandler
#   23|     3: [AddEventAccessor] add_Event
#-----|       2: (Parameters)
#   23|         0: [Parameter] value
#   23|     4: [RemoveEventAccessor] remove_Event
#-----|       2: (Parameters)
#   23|         0: [Parameter] value