collections/Test.java:
#    0| [CompilationUnit] Test
#-----|   -1: (Imports)
#    3|     1: [ImportOnDemandFromPackage] import java.util.*
#    5|   1: [Class] Test
#    6|     3: [FieldDeclaration] Map<String,Integer> m, ...;
#    6|       -1: [TypeAccess] Map<String,Integer>
#    6|         0: [TypeAccess] String
#    6|         1: [TypeAccess] Integer
#    6|       0: [ClassInstanceExpr] new LinkedHashMap<String,Integer>(...)
#    6|         -3: [TypeAccess] LinkedHashMap<String,Integer>
#    6|           0: [TypeAccess] String
#    6|           1: [TypeAccess] Integer
#    8|     4: [BlockStmt] { ... }
#    9|       0: [ExprStmt] <Expr>;
#    9|         0: [MethodAccess] put(...)
#    9|           -1: [VarAccess] m
#    9|           0: [StringLiteral] "key"
#    9|           1: [IntegerLiteral] 23