set method
value - an List or [TypedData from which to copy values.
offset - (optional) index of the array at
which to start copying.
Calls
TypedArray.set( value, offset ) on the
array.
In particular, see that page for requirements on value being
a TypedData.
Implementation
BufferAttribute set(value, {int offset = 0}) {
array[offset] = value;
return this;
}