Function gl::GetTransformFeedbackVarying

pub unsafe fn GetTransformFeedbackVarying(
    program: GLuint, 
    index: GLuint, 
    bufSize: GLsizei, 
    length: *mut GLsizei, 
    size: *mut GLsizei, 
    type_: *mut GLenum, 
    name: *mut GLchar
)

Fallbacks: GetTransformFeedbackVaryingEXT