Return the number of Fieldgroups this field is used in.
Primarily used to check if the Field is deletable.
Usage
$int = $field->numFieldgroups();
Return value
int
API reference based on ProcessWire core version 3.0.236
“Yesterday I sent the client a short documentation for their ProcessWire-powered website. Today all features already used with no questions. #cmsdoneright” —Marc Hinse, Web designer/developer