Macro property_spec_symbol_getter_setter 

macro_rules! property_spec_symbol_getter_setter {
    ($getter:expr, $setter:expr, $symbol:expr, $attrs:expr) => { ... };
    ($getter:expr, $setter:expr, $symbol:expr) => { ... };
    ($getter:expr, $setter:expr) => { ... };
}

Available on crate feature macros only.