Function variable_decl_requires_default_perm 

pub(crate) fn variable_decl_requires_default_perm<'db>(
    db: &'db dyn Db,
    decl: VariableDecl<'db>,
    scope: &Scope<'_, 'db>,
) -> bool

Returns true if a variable declaration requires a default permission. See PopulateDefaultSymbols trait for examples.