Add types into your deno config file(eg: deno.jsonc):
{
"$schema": "https://deno.land/x/deno/cli/schemas/config-file.v1.json",
"compilerOptions": {
"types": [
// add types of BreezeRuntime
"https://cdn.jsdelivr.net/gh/Byzanteam/breeze-js@latest/mod.d.ts"
]
}
}