code: function removeDefaults (schema, options) {
    options = options || {}
    
    schema.method('removeDefaults', function () {
      var self = this
      schema.eachPath(function (name, path) {
        var current = self._doc[name]
          , defaults = path.defaultValue
  
        // Check for numbers, as the schema will hold them as 
        // objects with path related properties
        if (toString.call(current) === '[object Number]') {
          current =  Number(current)
          defaults = Number(defaults)
        }
  
        // Remove property if it matches the default
        if (current === defaults) {
          delete self._doc[name]
        }
      })
      return this
    })
  }
docs: Remove Defaults --------------- Plugin