Macro shopify::request_query

macro_rules! request_query {
    (
    pub struct $t:ident {
      $(pub $key:ident: Option<$field_t:ty>),*
      $(,)*
    }
  ) => { ... };
    (PUSH_FIELD $s:expr, $v:expr, $key:ident, $t:tt) => { ... };
}