A sequence containing the text-container child elements of this
        ``<a:p>`` element, i.e. (a:r|a:br|a:fld).

def content_children(self):
        """
        A sequence containing the text-container child elements of this
        ``<a:p>`` element, i.e. (a:r|a:br|a:fld).
        """
        text_types = {CT_RegularTextRun, CT_TextLineBreak, CT_TextField}
        return tuple(elm for elm in self if type(elm) in text_types)