function(target, targetOffset, offset, length) {
    return this.toBuffer().copy(target, targetOffset, offset, length);
  }
function(target, targetOffset, offset, length) {
    return this.toBuffer().copy(target, targetOffset, offset, length);
  }
function ( target , targetOffset , offset , length ) { return this . toBuffer ( ) . copy ( target , targetOffset , offset , length ) ; }
copy to target buffer
copy to target buffer
Copy the contents of the sequence to a buffer.