composer[key] = function()

in composer.js [163:176]


    composer[key] = function () {
      const composition = { type, '.combinator': () => combinator }
      const skip = (combinator.args && combinator.args.length) || 0
      if (!combinator.components && (arguments.length > skip)) {
        throw new ComposerError(`Too many arguments in "${type}" combinator`)
      }
      for (let i = 0; i < skip; ++i) {
        composition[combinator.args[i].name] = arguments[i]
      }
      if (combinator.components) {
        composition.components = Array.prototype.slice.call(arguments, skip)
      }
      return new Composition(composition)
    }