https://doc.rust-lang.org/stable/core/ops/trait.BitOrAssign.html
BitOrAssign in core::ops - Rust
The bitwise OR assignment operator `|=`.
coreopsrust
https://paritytech.github.io/polkadot-sdk/master/sp_std/ops/trait.BitOrAssign.html
BitOrAssign in sp_std::ops - Rust
The bitwise OR assignment operator `|=`.
spstdopsrust