Cargo Features

[dependencies]
qldb = { version = "3.2.9", default-features = false, features = ["internal_pool_with_spawner", "internal_pool_with_thread"] }
default = internal_pool_with_spawner, internal_pool_with_thread

These default features are set whenever qldb is added without default-features = false somewhere in the dependency tree.

internal_pool_with_spawner default
internal_pool_with_thread default

QLDB has 3 features without comments.