code: function( nspath ) {
  		var found = true,
  			nsparts = nspath.split( rpathsplit ),
  			focus = render.options.focus;
  
  		// Allow single path string
  		if ( munit.isString( focus ) ) {
  			focus = [ focus ];
  		}
  
  		// If set, only add modules that belong on the focus path(s)
  		if ( munit.isArray( focus ) && focus.length ) {
  			found = false;
  
  			focus.forEach(function( fpath ) {
  				var fparts = fpath.split( rpathsplit ),
  					i = -1, l = Math.min( fparts.length, nsparts.length );
  
  				// Check that each namespace of the focus path
  				// exists inside the modules path
  				for ( ; ++i < l; ) {
  					if ( fparts[ i ] !== nsparts[ i ] ) {
  						return;
  					}
  				}
  
  				// Paths line up
  				found = true;
  			});
  		}
  
  		return found;
  	}
docs: Testing path to see if it exists in the focus option