No reliable way to distinguish code actions on client side

[yyoncho]

All of the code actions have the same command name - java.apply.workspaceEdit and the only way to distinguish them is to use title which is not reliable. This is inconvenient if the client wants to bind code action to a shortcut.

[gorkem]

See also microsoft/language-server-protocol#389 which is also dealing with same sort of concerns

[fbricon]

Now we need an lsp4j update to support those codeaction kinds

[yaohaizh]

Logged an issue: eclipse-lsp4j/lsp4j#194

[yaohaizh]

The code action kind was added.

[yyoncho]

@gorkem @fbricon how do I use kind to distinguish the action kinds given the fact that a lot of the code actions have the same kind "quickfix"? For example, I want to bind Add throws declaration to a shortcut.