Several JShell API queries return transient values as lists. These lists are then often streamed over. A previous API review requested several queries be converted to return Stream. Two of the below are non-transient and are side-effected (cannot be trivially repeated) thus I am excluding them: eval() and drop(). An imports() query has been added since this request. This leaves --

Stream<Snippet> snippets()
Stream<VarSnippet> variables()
Stream<MethodSnippet> methods()
Stream<TypeDeclSnippet> types()
Stream<ImportSnippet> imports()
Stream<Diag> diagnostics(Snippet snippet)
Stream<String> unresolvedDependencies(DeclarationSnippet snippet)


Original request --
Stream<Diag> diagnostics(Snippet snippet)
Stream<SnippetEvent> drop(PersistentSnippet snippet)
Stream<SnippetEvent> eval(java.lang.String input)
Stream<MethodSnippet> methods()
Stream<Snippet> snippets()
Stream<TypeDeclSnippet> types()
Stream<java.lang.String> unresolvedDependencies(DeclarationSnippet snippet)
Stream<VarSnippet> variables()