How to use the gl-react.Shaders.get function in gl-react

const contextChildren = dataContextChildren.map(traverseTree);

      // Traverse children and compute children renderData.
      // We build a framebuffer mapping (from child index to fbo index)
      const children = dataChildren.map(traverseTree);

      // Sync shader
      let shader;
      if (s in shaders) {
        shader = shaders[s]; // re-use existing gl-shader instance
      } else if (s in prevShaders) {
        shader = shaders[s] = prevShaders[s]; // re-use old gl-shader instance
      } else {
        // Retrieve/Compiles/Prepare the shader
        const shaderObj = Shaders.get(s);
        invariant(shaderObj, "Shader #%s does not exists", s);
        shader = createShader(gl, vertShader, shaderObj.frag);
        shader.name = shaderObj.name;
        shader.attributes._p.pointer();
        shaders[s] = shader;
      }

      // extract uniforms and textures
      let uniforms = {}; // will contains all uniforms values (including texture units)
      let textures = {}; // a texture is an object with a bind() function
      let units = 0; // Starting from 0, we will affect texture units to texture uniforms
      for (const uniformName in dataUniforms) {
        const value = dataUniforms[uniformName];
        const type = shader.types.uniforms[uniformName];

        invariant(