Function ruby_seed_assignment 

pub fn ruby_seed_assignment(
    semantic: &RubySemanticIndex<'_>,
    file: &ProjectFile,
    visible_files: &HashSet<ProjectFile>,
    lexical_stack: &[String],
    method_stack: &[ReceiverMode],
    locals: &mut LocalInferenceEngine<String>,
    node: Node<'_>,
    source: &str,
)