code: function when(condition, configSetters) {
    assertConfigSetters(configSetters)
  
    if (condition) {
      return group(configSetters)
    } else {
      return () => config => config
    }
  }
docs: Applies an array of webpack blocks only if `condition` is true.
  
  @param {boolean} condition         Condition to test
  @param {Function[]} configSetters  Array of functions as returned by webpack blocks.
  @return {Function}