text: /*
   * Licensed to Elasticsearch B.V. under one or more contributor
   * license agreements. See the NOTICE file distributed with
   * this work for additional information regarding copyright
   * ownership. Elasticsearch B.V. licenses this file to you under
   * the Apache License, Version 2.0 (the "License"); you may
   * not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *    http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing,
   * software distributed under the License is distributed on an
   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   * KIND, either express or implied.  See the License for the
   * specific language governing permissions and limitations
   * under the License.
   */
  
  export function initYAxis(chart) {
    const y = chart.aspects.y;
  
    if (Array.isArray(y)) {
      // TODO: vis option should allow choosing this format
      chart.yAxisFormatter = y[0].fieldFormatter;
      chart.yAxisLabel = y.length > 1 ? '' : y[0].title;
    }
  
    const z = chart.aspects.series;
    if (z) {
      if (Array.isArray(z)) {
        chart.zAxisFormatter = z[0].fieldFormatter;
        chart.zAxisLabel = '';
      } else {
        chart.zAxisFormatter = z.fieldFormatter;
        chart.zAxisLabel = z.title;
      }
    }
  }
  