get_dimensions_2d and get_dimensions_3d should not have Iterable param

signature should be:

def get_dimensions_2d(
    dim_x: DimensionDefinitionType, 
    dim_y: DimensionDefinitionType, 
    center: CenterDefinitionType) -> Interval2D:

def get_dimensions_3d(
    dim_x: DimensionDefinitionType, 
    dim_y: DimensionDefinitionType, 
    dim_z: DimensionDefinitionType, 
    center: CenterDefinitionType) -> Interval3D:

