[ENSCORESW-2541]. Prototype unit test for mutable interval trees.
[ENSCORESW-2541]. Prototype unit test for mutable interval trees.

muffato/ensembl,Ensembl/ensembl,james-monkeyshines/ensembl,james-monkeyshines/ensembl,muffato/ensembl,muffato/ensembl,muffato/ensembl,Ensembl/ensembl,james-monkeyshines/ensembl,james-monkeyshines/ensembl,Ensembl/ensembl,Ensembl/ensembl