function stringToGlsl(string) {
  return numberToGlsl(getStringNumberEquivalent(string));
}
Returns a stable equivalent number for the string literal, for use in shaders. This number is then
converted to be a GLSL-compatible string.
Note: with a float precision of `mediump`, the amount of unique strings supported is 16,777,216
@param {string} string String literal value
@return {string} GLSL-compatible string containing a number