public Builder withTaskInput(Map<String, Object> val) {
            taskInput = val;
            return this;
        }
Sets the {@code taskInput} and returns a reference to this Builder so that the methods
can be chained together.

@param val the {@code taskInput} to set
@return a reference to this Builder
core/src/main/java/com/netflix/conductor/core/execution/mapper/TaskMapperContext.java