/// **Trait `Cap`**
////// Provides an interface to track the capacity of allocated memory.
////// # Methods
/// - `__cap()` - Retrieves the current capacity.
/// - `__cap_set(cap)` - Updates the capacity.
pubtraitCap{/// Returns the current capacity.
fn__cap(&self)->usize;/// Sets the capacity to a new value.
////// # Arguments
/// * `new_cap` - The new capacity.
fn__cap_set(&mutself, new_cap:usize);}