plugins/routers/joint.routers.manhattan.js
function getSourceAnchor(linkView, opt) {

        if (linkView.sourceAnchor) return linkView.sourceAnchor;

        // fallback: center of bbox
        var sourceBBox = getSourceBBox(linkView, opt);
        return sourceBBox.center();
    }
function getSourceAnchor(linkView, opt) {

        if (linkView.sourceAnchor) return linkView.sourceAnchor;

        // fallback: center of bbox
        var sourceBBox = getSourceBBox(linkView, opt);
        return sourceBBox.center();
    }
function getSourceAnchor ( linkView , opt ) { if ( linkView . sourceAnchor ) return linkView . sourceAnchor ; // fallback: center of bbox var sourceBBox = getSourceBBox ( linkView , opt ) ; return sourceBBox . center ( ) ; }
return source anchor
return source anchor