Method: Output the metabox for setting what type of field this is.

Method: Output the metabox for setting the field’s position into the signup form.

Method: Output hidden fields used by default field.

Method: Return if a field ID is the default field.

Method: Gets the IDs of fields applicable for a given member type or array of member types.

Method: Private method used to output field visibility metaboxes.

Method: Validate form field data on submission.

Method: Output the metabox for setting if field is required or not.

Method: Save miscellaneous settings for this field.

Method: Private method used to output autolink metabox.