Function extract_blank_node 

pub fn extract_blank_node(
    query: Query<'_, '_, (&Element, &Source, &RopeC, &Label, &PositionComponent, &DynLang, &mut CodeActionRequest)>,
    config: Res<'_, ServerConfig>,
)

Code action: when the cursor sits inside an anonymous blank node [ … ], offer to extract it into a labelled blank node (_:bN) declared as a separate statement. For example:

<#s> foaf:knows [ foaf:name "Alice" ] .

becomes

<#s> foaf:knows _:b0 .
_:b0 foaf:name "Alice" .

This is generic over the language marker L; every text RDF syntax whose parsed model is Turtle (Turtle, TriG, SPARQL, N3, …) can reuse it.