https://nl.mathworks.com/help/matlab/ref/matlab.mixin.indexing.redefinesdot.parendotassign.html
matlab.mixin.indexing.RedefinesDot.parenDotAssign - Object assignments with combined parentheses...
This MATLAB function handles assignment operations that begin with built-in parentheses indexing immediately followed by customized dot indexing.
matlabmixinindexingobjectassignments