Export Data Entity To Excel - Custom Cell Positions & Values

Is there any example on how to use custom cell positions and custom cell values.

I would like to rename the excel output headings with spaces. Alias property is not allowing is there any way to achieve this?

When I try below values in positions and values it gives error

a!exportDataStoreEntityToExcel(
entity: cons!IC_DOP_CONS_entity
selection: a!querySelection({
a!queryColumn(field: "assignee",alias: "Inputter"),
a!queryColumn(field: "CaseNumber",alias: "Case_Number"),
}),
filters: a!queryFilter(
field: "Id",
operator: "=",
value: ri!Id
),
documentName:"Doc"&"_"&now(),
saveInFolder: cons!IC_DOP_CONS_POINTER_DOCUMENTS_FOLDER,
customCellPositions: {"Inputter"},
customCellValues: {rule!IC_DOP_getUserFullName(inputter)},
onSuccess: a!save(
local!exportDocId,
fv!newDocument
),
onError: a!save(
local!errorMessage,
"Error Generating Excel File"
)
)

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