public boolean contains(Object value) {
    return containsValue(value);
  }
Legacy method testing if some key maps into the specified value in this table. This method is
identical in functionality to {@link #containsValue}, and exists solely to ensure full
compatibility with class {@link java.util.Hashtable}, which supported this method prior to
introduction of the Java Collections framework.

@param value a value to search for
@return <tt>true</tt> if and only if some key maps to the <tt>value</tt> argument in this table
        as determined by the <tt>equals</tt> method; <tt>false</tt> otherwise
@throws NullPointerException if the specified value is null
geode-core/src/main/java/org/apache/geode/internal/ObjIdConcurrentMap.java