write each used Ramda function as if `R` is in the global scope
function writeRamdaFunctionAsGlobalStub(ctx) {
    ctx.newLineTop()
    ctx.newLineTop()

    Object.keys(ctx.usedRamdaFns).forEach(function(key) {
        ctx.newLineTop()
        ctx.writeTop('var ' + key + ' = R.' + key)
    })
}