Configure the bullets of a list created with the tasks package

Question

I want to split the content of a bulleted list in a beamer presentation into several columns. Apparently this can be be easily acomplished through a tasks environment. My problem is that the bullets produced by tasks are different to those produced by itemize. This is what I have attempted so far:

\documentclass{beamer}
\usepackage{tasks}
\setbeamercolor{structure}{fg=RoyalBlue}
\useinnertheme[shadow]{rounded}\usesubitemizeitemtemplate{%
    \tiny\raise1.5pt\hbox{\color{beamerstructure}$\blacktriangleright$}%
}
\begin{document}
\begin{frame}
    \frametitle{Title}
        Itemize:
        \begin{itemize}
            \item foo
            \item bar
            \item baz
        \end{itemize}
        Tasks:
        \begin{tasks}label=\textbullet
        %\begin{tasks}style=itemize  % ERROR
        %\begin{tasks}label=\labelitemi  % ERROR
            \task foo
            \task bar
            \task baz
        \end{tasks}
\end{frame}
\end{document}

This is the output I get: If I try any of the commented options the following error is thrown:

...
! Undefined control sequence.
\thetask ->\labelitemi
l.25 \end{frame}
? 

How could I obtain exactly the same bullets?

Answer 1

Adaptations

• changed color to blue, because RoyalBlue is not defined
• defined a command \tball that draw a shaded ball with tikz
• set label-format=\tball
• set label and label-width

Result

Code

\documentclass{beamer}
\usepackage{tikz}
\usepackage{multicol}
\usepackage{tasks}
\setbeamercolor{structure}{fg=blue}
\useinnertheme[shadow]{rounded}\usesubitemizeitemtemplate{%
    \tiny\raise1.5pt\hbox{\color{beamerstructure}$\blacktriangleright$}%
}
\newcommand{\tball}{\tikz \shade[ball color=blue] (0,0) circle (2.5pt);}
\begin{document}
\begin{frame}{Title}
    \texttt{itemize} within \texttt{multicols}:
    \begin{multicols}{3}
        \begin{itemize}
        \item foo
        \item bar
        \item baz
        \end{itemize}
    \end{multicols}
\texttt{tasks}:
\begin{tasks}[label-format=\tball, label={}, label-width=8pt](3)
\task foo
\task bar
\task baz
\end{tasks}

\end{frame}
\end{document}