plugins/sigma.plugins.filter/sigma.plugins.filter.js
function unregister (o) {
    _chain = _chain.filter(function(a) {
      return !(a.key in o);
    });

    for(var key in o)
      delete _keysIndex[key];
  }
function unregister (o) {
    _chain = _chain.filter(function(a) {
      return !(a.key in o);
    });

    for(var key in o)
      delete _keysIndex[key];
  }
function unregister ( o ) { _chain = _chain . filter ( function ( a ) { return ! ( a . key in o ) ; } ) ; for ( var key in o ) delete _keysIndex [ key ] ; }
This function removes a set of filters from the chain.

@param {object} o The filter keys.
This function removes a set of filters from the chain .