Returns {@code true} if this queue contains the specified element.
More formally, returns {@code true} if and only if this queue contains
at least one element {@code e} such that {@code o.equals(e)}.
@param o object to be checked for containment in this queue
@return {@code true} if this queue contains the specified element
Returns {@code true} if this queue contains the specified element. More formally, returns {@code true} if and only if this queue contains at least one element {@code e} such that {@code o.equals(e)}.
@param o object to be checked for containment in this queue @return {@code true} if this queue contains the specified element