function addEquivalentTransforms(
  projections1,
  projections2,
  forwardTransform,
  inverseTransform,
) {
  projections1.forEach(function (projection1) {
    projections2.forEach(function (projection2) {
      addTransformFunc(projection1, projection2, forwardTransform);
      addTransformFunc(projection2, projection1, inverseTransform);
    });
  });
}
Registers transformation functions to convert coordinates in any projection
in projection1 to any projection in projection2.

@param {Array<Projection>} projections1 Projections with equal
    meaning.
@param {Array<Projection>} projections2 Projections with equal
    meaning.
@param {TransformFunction} forwardTransform Transformation from any
  projection in projection1 to any projection in projection2.
@param {TransformFunction} inverseTransform Transform from any projection
  in projection2 to any projection in projection1..