code: function gltfToGlb(gltf, binaryBuffer) {
      const buffer = gltf.buffers[0];
      if (defined(buffer.uri)) {
          binaryBuffer = Buffer.alloc(0);
      }
  
      // Create padded binary scene string
      const jsonBuffer = getJsonBufferPadded(gltf);
  
      // Allocate buffer (Global header) + (JSON chunk header) + (JSON chunk) + (Binary chunk header) + (Binary chunk)
      const glbLength = 12 + 8 + jsonBuffer.length + 8 + binaryBuffer.length;
      const glb = Buffer.alloc(glbLength);
  
      // Write binary glTF header (magic, version, length)
      let byteOffset = 0;
      glb.writeUInt32LE(0x46546C67, byteOffset);
      byteOffset += 4;
      glb.writeUInt32LE(2, byteOffset);
      byteOffset += 4;
      glb.writeUInt32LE(glbLength, byteOffset);
      byteOffset += 4;
  
      // Write JSON Chunk header (length, type)
      glb.writeUInt32LE(jsonBuffer.length, byteOffset);
      byteOffset += 4;
      glb.writeUInt32LE(0x4E4F534A, byteOffset); // JSON
      byteOffset += 4;
  
      // Write JSON Chunk
      jsonBuffer.copy(glb, byteOffset);
      byteOffset += jsonBuffer.length;
  
      // Write Binary Chunk header (length, type)
      glb.writeUInt32LE(binaryBuffer.length, byteOffset);
      byteOffset += 4;
      glb.writeUInt32LE(0x004E4942, byteOffset); // BIN
      byteOffset += 4;
  
      // Write Binary Chunk
      binaryBuffer.copy(glb, byteOffset);
      return glb;
  }
docs: Convert a glTF to binary glTF.
  
  The glTF is expected to have a single buffer and all embedded resources stored in bufferViews.
  
  @param {Object} gltf The glTF asset.
  @param {Buffer} binaryBuffer The binary buffer.
  @returns {Buffer} The glb buffer.
  
  @private