Op("gather") {
        javaPackage = "org.nd4j.linalg.api.ops.impl.shape"
        Input(NDARRAY, "df") { description = "Input variable" }
        Input(INT, "indices") { description = "Indices to get slices for. Rank 0 or 1 input" }
        Arg(INT, "axis") { description = "Axis that the indices refer to" }