You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: conv_symmetric.go
    path of file: ./repos/gonum/blas/blas64
    
    the code of the file until where you have to start completion: // Copyright Â©2015 The Gonum Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package blas64

import "gonum.org/v1/gonum/blas"

// SymmetricCols represents a matrix using the conventional column-major storage scheme.
type SymmetricCols Symmetric

// From fills the receiver with elements from a. The receiver
// must have the same dimensions and uplo as a and have adequate
// backing data 
    
func (t SymmetricBand) From(a SymmetricBandCols) {
	if t.N != a.N {
		panic("blas64: mismatched dimension")
	}
	if t.K != a.K {
		panic("blas64: mismatched bandwidth")
	}
	if a.Stride < a.K+1 {
		panic("blas64: short stride for source")
	}
	if t.Stride < t.K+1 {
		panic("blas64: short stride for destination")
	}
	if t.Uplo != a.Uplo {
		panic("blas64: mismatched BLAS uplo")
	}
	dst := Band{
		Rows: t.N, Cols: t.N,
		Stride: t.Stride,
		Data:   t.Data,
	}
	src := BandCols{
		Rows: a.N, Cols: a.N,
		Stride: a.Stride,
		Data:   a.Data,
	}
	switch a.Uplo {
	default:
		panic("blas64: bad BLAS uplo")
	case blas.Upper:
		dst.KU = t.K
		src.KU = a.K
	case blas.Lower:
		dst.KL = t.K
		src.KL = a.K
	}
	dst.From(src)
}