fields/FieldTest.java:
#    0| [CompilationUnit] FieldTest
#    3|   1: [Class] FieldTest
#    4|     4: [FieldDeclaration] float ff, ...;
#    4|       -1: [TypeAccess] float
#    4|       1: [FloatLiteral] 2.3f
#    5|     5: [FieldDeclaration] Object obj, ...;
#    5|       -1: [TypeAccess] Object
#    5|       0: [NullLiteral] null
#    6|     6: [FieldDeclaration] List<> l, ...;
#-----|       -2: (Annotations)
#    6|         1: [Annotation] SuppressWarnings
#    6|           1: [StringLiteral] "rawtypes"
#    6|       -1: [TypeAccess] List<>
#    7|     7: [FieldDeclaration] int x;
#    7|       -1: [TypeAccess] int
#    7|       0: [IntegerLiteral] 0
#    8|     8: [FieldDeclaration] int y;
#    8|       -1: [TypeAccess] int
#    8|       0: [AssignExpr] ...=...
#    8|         0: [VarAccess] x
#    8|         1: [IntegerLiteral] 1
#    9|     9: [BlockStmt] { ... }
#   10|       0: [ExprStmt] <Expr>;
#   10|         0: [AssignExpr] ...=...
#   10|           0: [VarAccess] x
#   10|           1: [IntegerLiteral] 2
#   12|     10: [FieldDeclaration] int z;
#   12|       -1: [TypeAccess] int
#   12|       0: [IntegerLiteral] 0
#   13|     11: [FieldDeclaration] int w;
#   13|       -1: [TypeAccess] int
#   13|       0: [AssignExpr] ...=...
#   13|         0: [VarAccess] z
#   13|         1: [IntegerLiteral] 1
#   14|     12: [BlockStmt] { ... }
#   15|       0: [ExprStmt] <Expr>;
#   15|         0: [AssignExpr] ...=...
#   15|           0: [VarAccess] z
#   15|           1: [IntegerLiteral] 2