Function pad 

pub fn pad<T: HasAfEnum>(
    input: &Array<T>,
    begin: Dim4,
    end: Dim4,
    fill_type: BorderType,
) -> Array<T>

Pad input Array along borders

Parameters

• input is the input array to be padded
• begin is padding size before first element along a given dimension
• end is padding size after the last element along a given dimension
• fill_type indicates what values should be used to fill padded regions

Return Values

Padded Array