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Rust EtherCAT equivalent to ecrt_master_create_domain()

Whereas in C++ you would use

ethercat_create_domain.cpp
// Create domain
domain = ecrt_master_create_domain(master);
if (!domain) {
    std::cerr << "Failed to create domain!" << std::endl;
    return -1;
}

the Rust equivalent using the ethercat crate would be:

ethercat_create_domain.rs
use ethercat::{Domain, Master};

let domain_idx = master.create_domain()?;

Full example including master request and domain creation:

ethercat_master_and_domain.rs
use ethercat::{Master, MasterAccess};

// You may also use MasterAccess::ReadOnly if you don't need write access
// 0 is the index of the master to open (usually 0)
let mut master = Master::open(0, MasterAccess::ReadWrite)?;
// Reserve (aka "request") the master (for exclusive access, basically)
master.reserve()?;

// Create domain
let domain_idx = master.create_domain()?;
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