@Override
    public String toString() {
        return "CompletionsRequest{" +
               "dataSourceRef=" + dataSourceRef +
               ", textType=" + textType +
               ", text='" + text + '\'' +
               ", row=" + row +
               ", column=" + column +
               ", pattern='" + pattern + '\'' +
               ", includedTypes=" + includedTypes +
               ", maxCompletions=" + maxCompletions +
               '}';
    }
@param textType
@param includedTypes  Set to false to exclude datasources and structure items.
@param maxCompletions
stroom-core-shared/src/main/java/stroom/query/shared/CompletionsRequest.java