You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: value.rs
    path of file: ./repos/scryfall-rs/src/search/param
    
    the code of the file until where you have to start completion: //! This module defines the types for searching with parameters that can take
//! a value argument. The type [`ValueKind`] defines the parameter that is
//! being searched for, and cannot be constructed directly. Instead, use helper
//! functions such as [`oracle_text()`], [`artist()`], or [`toughness()`].
//!
//! The helper functions are generic and are constrained by [`ParamValue`] and
//! its sub-traits, in order to allow more flexibility in their use.
//! See [`TextValue`], [
    
const fn numeric_property_str(prop: NumProperty) -> &'static str {
    match prop {
        NumProperty::Power => "power",
        NumProperty::Toughness => "toughness",
        NumProperty::PowTou => "powtou",
        NumProperty::Loyalty => "loyalty",
        NumProperty::Cmc => "cmc",
        NumProperty::ArtistCount => "artists",
        NumProperty::Usd => "usd",
        NumProperty::UsdFoil => "usdfoil",
        NumProperty::Eur => "eur",
        NumProperty::Tix => "tix",
        NumProperty::IllustrationCount => "illustrations",
        NumProperty::PrintCount => "prints",
        NumProperty::SetCount => "sets",
        NumProperty::PaperPrintCount => "paperprints",
        NumProperty::PaperSetCount => "papersets",
        NumProperty::Year => "year",
    }
}