rust - How do I initialize a static with calls to non-static functions? -

this question has answer here:

• how can make safe static singleton in rust? 2 answers
• how create global, mutable singleton? 1 answer

what proper way initialize such field, if there 1 @ all?

static args: hashmap<&str, vec<u8>> = ["nonce", "gas_price", "gas_limit", "to", "value", "data"]     .iter()     .map(|i| (*i, get_random()))     .collect(); 

i error:

error[e0015]: calls in statics limited constant functions, struct , enum constructors  --> src/main.rs:3:39   | 3 |   static args: hashmap<&str, vec<u8>> = ["nonce", "gas_price", "gas_limit", "to", "value", "data"]   |  _______________________________________^ starting here... 4 | |     .iter()   | |___________^ ...ending here