Trait RuntimeFlag  
pub trait RuntimeFlag {
    // Required methods
    fn is_static(&self) -> bool;
    fn is_eof(&self) -> bool;
    fn is_eof_init(&self) -> bool;
    fn spec_id(&self) -> SpecId;
}pub trait RuntimeFlag {
    // Required methods
    fn is_static(&self) -> bool;
    fn is_eof(&self) -> bool;
    fn is_eof_init(&self) -> bool;
    fn spec_id(&self) -> SpecId;
}