Can you summarize the entire story of Cholkar's vow to Sai Baba and his visit to Shirdi?

The story of Cholkar begins with a vow he made to Sai Baba, which involved abstaining from sugar until he could visit Shirdi. As described in Chapter 15, he faced financial difficulties, referred to as the challenge of crossing the "threshold-ghat" (home expenses), which delayed his pilgrimage. During this time, he diligently kept his vow, even drinking his tea without sugar. When he finally reached Shirdi, he fulfilled his vow by distributing sugar and offering a coconut. The most profound moment occurred when Sai Baba, who did not drink tea, instructed Cholkar's host, Jog, to give him "cups of tea, well-filled with sugar." This act, detailed in Chapter 15, revealed Baba's omniscience, confirming to Cholkar that his secret penance was known. Baba then taught him about his omnipresence, stating, "My home is in your heart; I am your inner self."