lib/types.js
function FixedType(attrs, opts) {
  Type.call(this, attrs, opts);

  if (attrs.size !== (attrs.size | 0) || attrs.size < 1) {
    throw new Error(f('invalid %s fixed size', this.getName(true)));
  }
  this._size = attrs.size | 0;
}
function FixedType(attrs, opts) {
  Type.call(this, attrs, opts);

  if (attrs.size !== (attrs.size | 0) || attrs.size < 1) {
    throw new Error(f('invalid %s fixed size', this.getName(true)));
  }
  this._size = attrs.size | 0;
}
function FixedType ( attrs , opts ) { Type . call ( this , attrs , opts ) ; if ( attrs . size !== ( attrs . size | 0 ) || attrs . size < 1 ) { throw new Error ( f ( 'invalid %s fixed size' , this . getName ( true ) ) ) ; } this . _size = attrs . size | 0 ; }
Avro fixed type.

Represented simply as a `Buffer`.
Avro fixed type .