tsl-devkit/lsp-server/test/request_json/completion.json

{
    "jsonrpc": "2.0",
    "id": 2,
    "method": "textDocument/completion",
    "params": {
        "textDocument": {
            "uri": "{{MAIN_UNIT_URI}}"
        },
        "position": {
            "line": 0,
            "character": 0
        },
        "context": {
            "triggerKind": 1
        }
    }
}