Function OpenDocument 

pub fn OpenDocument(
    URIComponentsDTO: Value,
    LanguageIdentifier: Option<String>,
    Content: Option<String>,
) -> ActionEffect<Arc<dyn DocumentProvider>, CommonError, Url>

Creates an effect that, when executed, will open an existing document from a URI or create a new untitled document, potentially with initial content.

It uses the DocumentProvider capability from the environment to perform the operation, which may involve file I/O and updating the central document store.

Parameters

• URIComponentsDTO: A serde_json::Value DTO representing the URI of the document to open, or null for a new untitled document.
• LanguageIdentifier: An optional language ID, primarily for new untitled documents.
• Content: Optional initial content for a new untitled document.

Returns

An ActionEffect that resolves with the canonical Url of the opened document.