def _insert_graphviz_configs(c):
    """Insert configurations for graphviz to the state.

    Graphviz is primarily used by automodapi to create dependency
    diagrams for Python.
    """
    c['graphviz_output_format'] = 'svg'
    c['graphviz_dot_args'] = ['-Nfontsize=10',
        '-Nfontname=Helvetica Neue, Helvetica, Arial, sans-serif',
        '-Efontsize=10',
        '-Efontname=Helvetica Neue, Helvetica, Arial, sans-serif',
        '-Gfontsize=10',
        '-Gfontname=Helvetica Neue, Helvetica, Arial, sans-serif']
    return c
