(BigQuery as any).getType_ = function(value) {
  let typeName;

  if (value instanceof (BigQuery as any).date) {
    typeName = 'DATE';
  } else if (value instanceof (BigQuery as any).datetime) {
    typeName = 'DATETIME';
  } else if (value instanceof (BigQuery as any).time) {
    typeName = 'TIME';
  } else if (value instanceof (BigQuery as any).timestamp) {
    typeName = 'TIMESTAMP';
  } else if (value instanceof Buffer) {
    typeName = 'BYTES';
  } else if (value instanceof Big) {
    typeName = 'NUMERIC';
  } else if (is.array(value)) {
    return {
      type: 'ARRAY',
      arrayType: (BigQuery as any).getType_(value[0]),
    };
  } else if (is.bool(value)) {
    typeName = 'BOOL';
  } else if (is.number(value)) {
    typeName = value % 1 === 0 ? 'INT64' : 'FLOAT64';
  } else if (is.object(value)) {
    return {
      type: 'STRUCT',
      structTypes: Object.keys(value).map(function(prop) {
        return {
          name: prop,
          type: (BigQuery as any).getType_(value[prop]),
        };
      }),
    };
  } else if (is.string(value)) {
    typeName = 'STRING';
  }

  if (!typeName) {
    throw new Error(
      [
        'This value could not be translated to a BigQuery data type.',
        value,
      ].join('\n')
    );
  }

  return {
    type: typeName,
  };
};

	export function is(value: any): value is LocalizeInfo {
		let candidate = value as LocalizeInfo;
		return Is.defined(candidate) && Is.string(candidate.key) && (Is.undef(candidate.comment) || (Is.array(candidate.comment) && candidate.comment.every(element => Is.string(element))));
	}