How to use the flatbuffers.Builder function in flatbuffers

bb.writeFloat32(0, 10);
// $ExpectError
bb.writeFloat32(0);
// $ExpectError
bb.writeFloat32("s", "t");

bb.writeFloat64(0, 10);
// $ExpectError
bb.writeFloat64(0);
// $ExpectError
bb.writeFloat64("s", "t");

/**
 * Builder
 */
let b = new fb.Builder();
new fb.Builder(0);
// $ExpectError
new fb.Builder("s");

fb.Builder.growByteBuffer(bb);
// $ExpectError
fb.Builder.growByteBuffer();
// $ExpectError
fb.Builder.growByteBuffer(0);
// $ExpectError
fb.Builder.growByteBuffer("s");

b.forceDefaults(true);
// $ExpectError
b.forceDefaults(0);
// $ExpectError

// $ExpectError
bb.writeFloat32(0);
// $ExpectError
bb.writeFloat32("s", "t");

bb.writeFloat64(0, 10);
// $ExpectError
bb.writeFloat64(0);
// $ExpectError
bb.writeFloat64("s", "t");

/**
 * Builder
 */
let b = new fb.Builder();
new fb.Builder(0);
// $ExpectError
new fb.Builder("s");

fb.Builder.growByteBuffer(bb);
// $ExpectError
fb.Builder.growByteBuffer();
// $ExpectError
fb.Builder.growByteBuffer(0);
// $ExpectError
fb.Builder.growByteBuffer("s");

b.forceDefaults(true);
// $ExpectError
b.forceDefaults(0);
// $ExpectError
b.forceDefaults("str");

// $ExpectError
bb.writeFloat32("s", "t");

bb.writeFloat64(0, 10);
// $ExpectError
bb.writeFloat64(0);
// $ExpectError
bb.writeFloat64("s", "t");

/**
 * Builder
 */
let b = new fb.Builder();
new fb.Builder(0);
// $ExpectError
new fb.Builder("s");

fb.Builder.growByteBuffer(bb);
// $ExpectError
fb.Builder.growByteBuffer();
// $ExpectError
fb.Builder.growByteBuffer(0);
// $ExpectError
fb.Builder.growByteBuffer("s");

b.forceDefaults(true);
// $ExpectError
b.forceDefaults(0);
// $ExpectError
b.forceDefaults("str");

b.dataBuffer();

function getParameter(type, path, defaultValue) {
  const builder = new flatbuffers.Builder(512);
  const pathOffset = builder.createString(path);
  const isObject = type === __std.ParamType.Object;
  const defaultValueOffset = isObject
    && defaultValue !== undefined
    && builder.createString(JSON.stringify(defaultValue));

  __std.ParamArgs.startParamArgs(builder);
  __std.ParamArgs.addPath(builder, pathOffset);
  __std.ParamArgs.addType(builder, type);
  if (isObject) {
    __std.ParamArgs.addDefaultValue(builder, defaultValueOffset);
  }
  const argsOffset = __std.ParamArgs.endParamArgs(builder);

  __std.Message.startMessage(builder);
  __std.Message.addArgsType(builder, __std.Args.ParamArgs);