fn expand(
sema: &Semantics<'_, RootDatabase>,
original_file: InFile<SyntaxNode>,
speculative_file: SyntaxNode,
original_offset: TextSize,
fake_ident_token: SyntaxToken,
relative_offset: TextSize,
) -> Option<ExpansionResult>fn expand(
sema: &Semantics<'_, RootDatabase>,
original_file: InFile<SyntaxNode>,
speculative_file: SyntaxNode,
original_offset: TextSize,
fake_ident_token: SyntaxToken,
relative_offset: TextSize,
) -> Option<ExpansionResult>