Function source 

pub fn source<'ast, 'gcx>(
    ast: &'ast SourceUnit<'ast>,
    file: &Arc<SourceFile>,
    rel_sol_path: &Path,
    abs_sol_path: &Path,
    gcx: Gcx<'gcx>,
    name_to_page: &NameToPage,
    git_url: Option<&str>,
    deployments: &[Deployment],
) -> Vec<(PathBuf, String)>

Render a single Solidity source file as a list of (relative_output_path, mdx_content) pairs.