disjoint disks property

A metric space $(X,d)$ is said to have the disjoint disks property (DDP)if for every pair of continuous maps $f,g:B^2\to X$ of the closedunit 2-ball (http://planetmath.org/StandardNBall) $B^2$into $X$ and every $ϵ>0$ there exist continuous maps$f^{\prime },g^{\prime }:B^2\to X$ such that , and$f^{\prime }(B^2)\cap g^{\prime }(B^2)=\mathrm{\varnothing }$.