\begingroup

yex.keyword.Begingroup(doc)

Begins a group, like {.

The group must be ended with \endgroup.

Source code in yex/keyword/other.py

@yex.decorator.control(
        expandable = True,
        )
def Begingroup(doc):
    r"""
    Begins a group, like `{`.

    The group must be ended with `\endgroup`.
    """
    doc.begin_group(
            from_begingroup = True,
            )