How to specify filter in ag-grid columnDef

Questions
1

I know how to specify to hide a column in the grid using the property columnDef:
JSON is

{hide: true}

I would like to set a text filter in the column def as a default when showing the grid but allow the user to change the filter using the grid column filter tools.

For example I have a field/column called ‘source’ that might contain ‘Deleted Account’. I would like to “pre-filter” by having the equivalent of a function like:

source.notContains( 'Deleted' )

Is there a place or doc where I can find out the syntax for this?

After some reading of docs I did find this api:

setFilterModel(filterModel)

And using this code:

	var filterModel_status = {
		"id_status": {
			"filterType":"text",
			"type":"notContains",
			"filter":"Deleted"
		}
	};
	elements.datagrid_student.setFilterModel(filterModel_status);

The filter is set when I view the grid.
However the docs have only an example of

`"type" : "contains"

I guessed at “notContains” and it worked.
However where do I find the other permissible values?

OK - more researching and found them in here Text Filter Options

More Issues:
can we only execute one of these ‘setFilterModel’ ?
I tried doing one call for each column and none work.
I tried placing both columns in the same object:

var filterModel_both = {
“id_status”: {
“filterType”:“text”,
“type”:“notContains”,
“filter”:“Deleted”
},
“id_role”: {
“filterType”:“text”,
“type”:“Contains”,
“filter”:“User”
}

};

And then called setFilterModel but only the first column (id_status here) was applied. The column filter for id_role was ignored.

Is this a limitation?