Split all object methods #53

Job	Run time
Build Ballerina Lang	3m 49s
Build Ballerina Distribution	1h 14m 21s
Build Stdlib Level (2)	13m 5s
Build Stdlib Level (1)	6m 2s
Build Stdlib Level (3)	8m 16s
Build Stdlib Level (4)	23m 58s
Build Stdlib Level (5)	40m 44s
Build Stdlib Level (6)	31m 15s
Build Stdlib Level (8)	1h 16m 32s
Build Stdlib Level (7)	25m 24s
Build Stdlib Level (9)	6m 54s
	5h 10m 20s

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