+- CompilationUnit[@PackageName = "c"]
   +- PackageDeclaration[@Name = "c"]
   |  +- ModifierList[@EffectiveModifiers = (), @ExplicitModifiers = ()]
   +- EmptyDeclaration[]
   +- ImportDeclaration[@ImportOnDemand = false, @ImportedName = "a", @ImportedSimpleName = "a", @ModuleImport = false, @PackageName = "", @Static = false]
   +- ImportDeclaration[@ImportOnDemand = false, @ImportedName = "b", @ImportedSimpleName = "b", @ModuleImport = false, @PackageName = "", @Static = false]
