Function parse_json 

pub fn parse_json(
    schema: &Schema,
    root_vertex: &str,
    json_val: &Value,
) -> Result<WInstance, ParseError>

Parse JSON into a W-type instance, guided by a schema.

The parser starts at root_vertex in the schema and recursively walks the JSON structure, creating nodes for each schema vertex encountered. Property edges guide which JSON fields become child nodes.

Errors

Returns ParseError if the JSON structure doesn’t match the schema or contains invalid values.