Can we specify a minimum height for a lightning:datatable/lightning-datatable?

It is a little bit fragile since it relies on the SLDS style class slds-table_header-fixed_container but this sets an (exaggeratedly large) min-height on the header div that gets rendered into the markup for the table.

.THIS .slds-table_header-fixed_container {
    min-height: 12em;
}