def METHOD_NAME(self):
    """Allows to connect field_or_fields_container input to the operator.
    Parameters
    ----------
    my_field_or_fields_container : Field or FieldsContainer
    Examples
    --------
    >>> from ansys.dpf import core as dpf
    >>> op = dpf.operators.mesh.split_fields()
    >>> op.inputs.field_or_fields_container.connect(my_field_or_fields_container)
    >>> # or
    >>> op.inputs.field_or_fields_container(my_field_or_fields_container)
    """
    return self._field_or_fields_container