code: function filter( node ) {
  	var isNullable;
  	var isOptional;
  	var type;
  	var desc;
  	var val;
  
  	if ( node.type ) {
  		if ( node.type.names.length === 1 ) {
  			type = node.type.names[ 0 ];
  		} else {
  			type = node.type.names;
  		}
  	} else {
  		type = '';
  	}
  	desc = node.description || '';
  	if ( hasOwn.call( node, 'defaultvalue' ) ) {
  		val = node.defaultvalue;
  	} else {
  		val = '';
  	}
  	if ( typeof node.optional === 'boolean' ) {
  		isOptional = node.optional;
  	} else {
  		isOptional = '';
  	}
  	if ( typeof node.nullable === 'boolean' ) {
  		isNullable = node.nullable;
  	} else {
  		isNullable = '';
  	}
  	return {
  		'name': node.name,
  		'type': type,
  		'description': desc,
  		'default': val,
  		'optional': isOptional,
  		'nullable': isNullable
  	};
  }
docs: FUNCTIONS // 
  Filters a `params` doclet element.
  
  @private
  @param {Object} node - doclet element
  @returns {Object} filtered object