ChronoPeriod (Groovy JDK enhancements)

Summary:
Method

| Detail:
Method

```
public interface ChronoPeriod
```
GDK enhancements for ChronoPeriod.
displayName:
ChronoPeriod
receiverFqcn:
java.time.chrono.ChronoPeriod

Methods Summary

Methods
Type Params	Return Type	Name and description
	`public boolean`	`isNonnegative()` Returns true if this period is zero or positive.
	`public boolean`	`isNonpositive()` Returns true if this period is zero or negative.
	`public boolean`	`isPositive()` Returns true if this period is positive, excluding zero.

- Method Detail
  - public boolean isNonnegative()
    
    Returns true if this period is zero or positive.
    Returns:
    true if nonnegative
    Since:
    2.5.0
  - public boolean isNonpositive()
    
    Returns true if this period is zero or negative.
    Returns:
    true if nonpositive
    Since:
    2.5.0
  - public boolean isPositive()
    
    Returns true if this period is positive, excluding zero.
    Returns:
    true if positive
    Since:
    2.5.0

Summary:
Method

| Detail:
Method