code: function replacePrimitive(node, value, yaml) {
    return yaml.substr(0, node.start_mark.pointer) +
      String(value) +
      yaml.substring(node.end_mark.pointer);
  }
docs: /*
  Place value in node range in yaml string
  
  @param node {Node}
  @param value {string}
  @param yaml {string}
  
  @returns {string}