BECN1 and ocular melanoma: Unexpectedly, metformin‐treated melanoma cells presented decreased levels of LC3 II/I ratio, Beclin1 and ATG5, and increased p62 in a dose‐dependent (Figure 2A and Figure S2A) and time‐dependent (Figure 2B and Figure S2B) manner, which indicated that metformin acted as an autophagy inhibitor in ocular melanoma cells.